Add day 15

AdventOfCode.csproj

@@ -2,15 +2,15 @@
 
     <PropertyGroup>
         <OutputType>Exe</OutputType>
-        <TargetFramework>net10.0</TargetFramework>
+        <TargetFramework>net9.0</TargetFramework>
         <ImplicitUsings>enable</ImplicitUsings>
         <Nullable>enable</Nullable>
         <LangVersion>latest</LangVersion>
     </PropertyGroup>
 
     <ItemGroup>
-      <PackageReference Include="BenchmarkDotNet" Version="0.15.8" />
-      <PackageReference Include="Spectre.Console" Version="0.54.0" />
+      <PackageReference Include="BenchmarkDotNet" Version="0.13.2" />
+      <PackageReference Include="Spectre.Console" Version="0.45.0" />
     </ItemGroup>
 
     <ItemGroup>
@@ -18,8 +18,4 @@
       <EmbeddedResource Include="Inputs\*" />
     </ItemGroup>
 
-    <ItemGroup>
-      <Content Include="Inputs\Day8.txt" />
-    </ItemGroup>
-
 </Project>

DayBenchmarker.cs

@@ -7,7 +7,7 @@ namespace AdventOfCode;
 [MemoryDiagnoser(false)]
 public class DayBenchmark
 {
-    private Day Day { get; } = new Day6();
+    private Day Day { get; } = new Day10();
 
     [GlobalSetup]
     public void Setup()

Days/Day1.cs

@@ -5,83 +5,60 @@ namespace AdventOfCode.Days;
 public class Day1 : Day
 {
     public override int Number => 1;
-    public override string Name => "Secret Entrance";
+    public override string Name => "Historian Hysteria";
 
     public override void RunPart1(bool display = true)
     {
-        var password = 0;
-        var dialPosition = 50;
+        List<int> leftNumbers = [];
+        List<int> rightNumbers = [];
 
-        foreach (var line in Input.EnumerateLines())
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            var direction = line[0];
-            var offset = int.Parse(line[1..]);
+            var separatorIndex = line.IndexOf(' ');
 
-            var sign = direction is 'L'
-                ? -1
-                : +1;
-
-            dialPosition = MathMod(dialPosition + (offset * sign), 100);
-
-            if (dialPosition is 0)
-            {
-                password++;
-            }
+            leftNumbers.Add(int.Parse(line[..separatorIndex]));
+            rightNumbers.Add(int.Parse(line[(separatorIndex + 1)..]));
         }
 
+        leftNumbers.Sort();
+        rightNumbers.Sort();
+
+        var totalDistance = leftNumbers.Zip(rightNumbers, (a, b) => Math.Abs(a - b)).Sum();
+
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Safe password is: [yellow]{password}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Total distance is: [yellow]{totalDistance}[/][/]");
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var password = 0;
-        var dialPosition = 50;
+        List<int> leftNumbers = [];
+        Dictionary<int, int> rightNumbersCount = [];
+        var similarityScore = 0;
 
-        foreach (var line in Input.EnumerateLines())
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            var direction = line[0];
-            var offset = int.Parse(line[1..]);
+            var separatorIndex = line.IndexOf(' ');
 
-            var originalSign = Math.Sign(dialPosition);
+            leftNumbers.Add(int.Parse(line[..separatorIndex]));
 
-            var sign = direction is 'L'
-                ? -1
-                : +1;
+            var rightNumber = int.Parse(line[(separatorIndex + 1)..]);
 
-            dialPosition = dialPosition + (offset * sign);
-
-            int clickCount;
-            if (dialPosition is 0)
+            if (!rightNumbersCount.TryAdd(rightNumber, 1))
             {
-                clickCount = 1;
+                rightNumbersCount[rightNumber]++;
             }
-            else
-            {
-                clickCount = Math.Abs(dialPosition) / 100; // Number of times the dial passed by 0
+        }
 
-                // If we did a loop around it counts as a "click" too
-                if (originalSign != 0 && originalSign != Math.Sign(dialPosition))
-                {
-                    clickCount++;
-                }
-            }
-
-            dialPosition = MathMod(dialPosition, 100);
-
-            password += clickCount;
+        foreach (var leftNumber in leftNumbers)
+        {
+            similarityScore += leftNumber * rightNumbersCount.GetValueOrDefault(leftNumber);
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Safe password is: [yellow]{password}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Similarity score is: [yellow]{similarityScore}[/][/]");
         }
     }
-
-    private static int MathMod(int left, int right)
-    {
-        return (Math.Abs(left * right) + left) % right;
-    }
 }

Days/Day10.cs

@@ -0,0 +1,169 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day10 : Day
+{
+    public override int Number => 10;
+    public override string Name => "Hoof It";
+
+    private const int MapSize = 60;
+
+    public override void RunPart1(bool display = true)
+    {
+        var hikingTrailsScores = 0;
+
+        var (heightMap, trailHeads) = ParseMap();
+
+        var hikingTrails = new HashSet<Point>();
+
+        foreach (var trailHead in trailHeads)
+        {
+            hikingTrails.Clear();
+
+            GetHikingTrailScore(trailHead, -1);
+
+            hikingTrailsScores += hikingTrails.Count;
+        }
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Sum of scores of hiking trails: [yellow]{hikingTrailsScores}[/][/]");
+        }
+
+        return;
+
+        void GetHikingTrailScore(Point position, int previousHeight)
+        {
+            // Out of bounds
+            if (position is { X: < 0 or >= MapSize } or { Y: < 0 or >= MapSize })
+            {
+                return;
+            }
+
+            var height = heightMap[position.X, position.Y];
+
+            if (height - previousHeight is not 1)
+            {
+                return;
+            }
+
+            if (height == 9)
+            {
+                hikingTrails.Add(position);
+            }
+
+
+            GetHikingTrailScore(position + (1, 0), height);
+            GetHikingTrailScore(position + (-1, 0), height);
+            GetHikingTrailScore(position + (0, 1), height);
+            GetHikingTrailScore(position + (0, -1), height);
+        }
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+        var (heightMap, trailHeads) = ParseMap();
+
+        var totalRating = 0;
+
+        foreach (var trailHead in trailHeads)
+        {
+            GetHikingTrailRating(trailHead, -1);
+        }
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Total rating of hiking trails: [yellow]{totalRating}[/][/]");
+        }
+
+        return;
+
+        void GetHikingTrailRating(Point position, int previousHeight)
+        {
+            // Out of bounds
+            if (position is { X: < 0 or >= MapSize } or { Y: < 0 or >= MapSize })
+            {
+                return;
+            }
+
+            var height = heightMap[position.X, position.Y];
+
+            if (height - previousHeight is not 1)
+            {
+                return;
+            }
+
+            if (height == 9)
+            {
+                totalRating++;
+            }
+
+            GetHikingTrailRating(position + (1, 0), height);
+            GetHikingTrailRating(position + (-1, 0), height);
+            GetHikingTrailRating(position + (0, 1), height);
+            GetHikingTrailRating(position + (0, -1), height);
+        }
+    }
+
+    private (byte[,] HeightMap, List<Point> TrailHeads) ParseMap()
+    {
+        var heightMap = new byte[MapSize, MapSize];
+        var trailHeads = new List<Point>();
+
+        var y = 0;
+        foreach (var line in Input.AsSpan().EnumerateLines())
+        {
+            var x = 0;
+            foreach (var height in line)
+            {
+                var heightValue = height - '0';
+
+                if (heightValue is 0)
+                {
+                    trailHeads.Add(new Point(x, y));
+                }
+
+                heightMap[x, y] = (byte)heightValue;
+
+                x++;
+            }
+
+            y++;
+        }
+
+        return (heightMap, trailHeads);
+    }
+
+
+    private readonly record struct Point(int X, int Y)
+        : IAdditionOperators<Point, Point, Point>,
+            ISubtractionOperators<Point, Point, Point>,
+            IMultiplyOperators<Point, int, Point>
+    {
+        public static Point operator +(Point left, Point right)
+        {
+            return new Point(left.X + right.X, left.Y + right.Y);
+        }
+
+        public static Point operator -(Point left, Point right)
+        {
+            return new Point(left.X - right.X, left.Y - right.Y);
+        }
+
+        public static Point operator *(Point left, int right)
+        {
+            return new Point(left.X * right, left.Y * right);
+        }
+
+        public static Point operator *(int left, Point right)
+        {
+            return new Point(right.X * left, right.Y * left);
+        }
+
+        public static implicit operator Point((int X, int Y) point)
+            => new(point.X, point.Y);
+    }
+}

Days/Day11.cs

@@ -0,0 +1,127 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day11 : Day
+{
+    public override int Number => 11;
+    public override string Name => "Plutonian Pebbles";
+
+    private const int BlinkIterations = 25;
+
+    public override void RunPart1(bool display = true)
+    {
+        var stones = ParseStones();
+
+        for (var iteration = 0; iteration < BlinkIterations; iteration++)
+        {
+            var index = 0;
+
+            while (index < stones.Count)
+            {
+                var stone = stones[index];
+                var stoneString = stone.ToString();
+
+                if (stone is 0)
+                {
+                    stones[index] = 1;
+                }
+                else if (stoneString.Length % 2 == 0)
+                {
+                    var splitIndex = stoneString.Length / 2;
+
+                    var leftStone = long.Parse(stoneString[..splitIndex]);
+                    var rightStone = long.Parse(stoneString[splitIndex..]);
+
+                    stones[index] = leftStone;
+                    stones.Insert(index + 1, rightStone);
+
+                    index++;
+                }
+                else
+                {
+                    stones[index] = stone * 2024;
+                }
+
+                index++;
+            }
+        }
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Number of stones after blinking {BlinkIterations} times: [yellow]{stones.Count}[/][/]");
+        }
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+        var stones = ParseStones().ToDictionary(s => s, _ => 1L);
+
+        for (var iteration = 0; iteration < (BlinkIterations * 3); iteration++)
+        {
+            var stonesToIterate = stones.ToList();
+
+            foreach (var (stone, count) in stonesToIterate)
+            {
+                var stoneString = stone.ToString();
+
+                if (stone is 0)
+                {
+                    SafeAdd(stones, 1, count);
+                }
+                else if (stoneString.Length % 2 == 0)
+                {
+                    var splitIndex = stoneString.Length / 2;
+
+                    var leftStone = long.Parse(stoneString[..splitIndex]);
+                    var rightStone = long.Parse(stoneString[splitIndex..]);
+
+                    SafeAdd(stones, leftStone, count);
+                    SafeAdd(stones, rightStone, count);
+                }
+                else
+                {
+                    SafeAdd(stones, stone * 2024, count);
+
+                }
+
+                SafeAdd(stones, stone, -count);
+            }
+        }
+
+        var stonesCount = stones.Sum(p => p.Value);
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Number of stones after blinking {BlinkIterations} times: [yellow]{stonesCount}[/][/]");
+        }
+    }
+
+    private List<long> ParseStones()
+    {
+        var stones = new List<long>();
+
+        var span = Input.AsSpan();
+
+        foreach (var stoneRange in span.Split(' '))
+        {
+            stones.Add(long.Parse(span[stoneRange]));
+        }
+
+        return stones;
+    }
+
+    private void SafeAdd(Dictionary<long, long> dictionary, long key, long valueToAdd)
+    {
+        if (dictionary.TryGetValue(key, out var currentValue))
+        {
+            dictionary[key] = currentValue + valueToAdd;
+        }
+        else
+        {
+            dictionary[key] = valueToAdd;
+        }
+    }
+}

Days/Day12.cs

@@ -0,0 +1,155 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day12 : Day
+{
+    public override int Number => 12;
+    public override string Name => "Garden Groups";
+
+    private const int GridSize = 140;
+
+    public override void RunPart1(bool display = true)
+    {
+        var areas = ParseAreas();
+
+        var visited = new HashSet<Point>();
+        var totalPrice = 0;
+
+        var currentArea = 0;
+        var currentPerimeter = 0;
+
+        for (var y = 0; y < GridSize; y++)
+        {
+            for (var x = 0; x < GridSize; x++)
+            {
+                // Skip already visited points
+                if (visited.Contains(new Point(x, y)))
+                {
+                    continue;
+                }
+
+                var id = areas[x, y];
+
+                ComputeAreaPrice(new Point(x, y), id, ref currentArea, ref currentPerimeter);
+
+                // Add price of fencing this area
+                totalPrice += currentArea * currentPerimeter;
+
+                currentArea = 0;
+                currentPerimeter = 0;
+            }
+        }
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Total pricing: [yellow]{totalPrice}[/][/]");
+        }
+
+        return;
+
+        void ComputeAreaPrice(Point position, byte id, ref int area, ref int perimeter)
+        {
+            if (!visited.Add(position))
+            {
+                return;
+            }
+
+            // Update area and perimeter
+            area++;
+            perimeter += 4;
+
+            var left = position with { X = position.X - 1 };
+            var right = position with { X = position.X + 1 };
+            var up = position with { Y = position.Y - 1 };
+            var down = position with { Y = position.Y + 1 };
+
+            if (left is { X: >= 0 and < GridSize } && areas[left.X, left.Y] == id)
+            {
+                perimeter--;
+
+                ComputeAreaPrice(left, id, ref area, ref perimeter);
+            }
+
+            if (right is { X: >= 0 and < GridSize } && areas[right.X, right.Y] == id)
+            {
+                perimeter--;
+
+                ComputeAreaPrice(right, id, ref area, ref perimeter);
+            }
+
+            if (up is { Y: >= 0 and < GridSize } && areas[up.X, up.Y] == id)
+            {
+                perimeter--;
+
+                ComputeAreaPrice(up, id, ref area, ref perimeter);
+            }
+
+            if (down is { Y: >= 0 and < GridSize } && areas[down.X, down.Y] == id)
+            {
+                perimeter--;
+
+                ComputeAreaPrice(down, id, ref area, ref perimeter);
+            }
+        }
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+
+    }
+
+    private byte[,] ParseAreas()
+    {
+        var areas = new byte[GridSize, GridSize];
+
+        int y = 0;
+
+        foreach (var line in Input.AsSpan().EnumerateLines())
+        {
+            int x = 0;
+
+            foreach (var area in line)
+            {
+                areas[x, y] = (byte)(area - 'A');
+
+                x++;
+            }
+
+            y++;
+        }
+
+        return areas;
+    }
+
+    private readonly record struct Point(int X, int Y)
+        : IAdditionOperators<Point, Point, Point>,
+            ISubtractionOperators<Point, Point, Point>,
+            IMultiplyOperators<Point, int, Point>
+    {
+        public static Point operator +(Point left, Point right)
+        {
+            return new Point(left.X + right.X, left.Y + right.Y);
+        }
+
+        public static Point operator -(Point left, Point right)
+        {
+            return new Point(left.X - right.X, left.Y - right.Y);
+        }
+
+        public static Point operator *(Point left, int right)
+        {
+            return new Point(left.X * right, left.Y * right);
+        }
+
+        public static Point operator *(int left, Point right)
+        {
+            return new Point(right.X * left, right.Y * left);
+        }
+
+        public static implicit operator Point((int X, int Y) point)
+            => new(point.X, point.Y);
+    }
+}

Days/Day13.cs

@@ -0,0 +1,87 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using System.Text;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day13 : Day
+{
+    public override int Number => 13;
+    public override string Name => "Claw Contraption";
+
+    private const int MaxButtonPress = 100;
+    private const int ButtonACost = 3;
+    private const int ButtonBCost = 1;
+
+    public override void RunPart1(bool display = true)
+    {
+        var lines = Input.AsSpan().EnumerateLines();
+
+        var minimumTokensToWin = 0;
+
+        while (lines.MoveNext())
+        {
+            var (aX, aY, bX, bY, goalX, goalY) = ParseMachine(ref lines);
+
+            for (var i = MaxButtonPress; i >= 0; i--)
+            {
+                var xOffset = bX * i;
+
+                if (xOffset > goalX)
+                {
+                    continue;
+                }
+
+                if ((goalX - xOffset) % aX != 0)
+                {
+                    continue;
+                }
+
+                var timesAPressed = (goalX - xOffset) / aX;
+
+                if (bY * i + aY * timesAPressed != goalY)
+                {
+                    continue;
+                }
+
+                minimumTokensToWin += i * ButtonBCost + timesAPressed * ButtonACost;
+
+                break;
+            }
+        }
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Minimum tokens to win all prizes: [yellow]{minimumTokensToWin}[/][/]");
+        }
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+
+    }
+
+    private (int aX, int aY, int bX, int bY, int goalX, int goalY) ParseMachine(ref SpanLineEnumerator lines)
+    {
+        var lineA = lines.Current;
+        lines.MoveNext();
+
+        var lineB = lines.Current;
+        lines.MoveNext();
+
+        var lineGoal = lines.Current;
+        lines.MoveNext();
+
+        return (
+            int.Parse(lineA[(lineA.IndexOf('+') + 1)..lineA.IndexOf(',')]),
+            int.Parse(lineA[(lineA.LastIndexOf('+') + 1)..]),
+
+            int.Parse(lineB[(lineB.IndexOf('+') + 1)..lineB.IndexOf(',')]),
+            int.Parse(lineB[(lineB.LastIndexOf('+') + 1)..]),
+
+            int.Parse(lineGoal[(lineGoal.IndexOf('=') + 1)..lineGoal.IndexOf(',')]),
+            int.Parse(lineGoal[(lineGoal.LastIndexOf('=') + 1)..])
+        );
+    }
+}

Days/Day14.cs

@@ -0,0 +1,151 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using System.Text;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day14 : Day
+{
+    public override int Number => 14;
+    public override string Name => "Restroom Redoubt";
+
+    private const int Height = 103;
+    private const int HeightCenter = Height / 2;
+
+    private const int Width = 101;
+    private const int WidthCenter = Width / 2;
+
+    private const int Iterations = 100;
+
+    public override void RunPart1(bool display = true)
+    {
+        var robots = ParseRobots();
+
+        for (var i = 0; i < Iterations; i++)
+        {
+            foreach (var robot in robots)
+            {
+                robot.Position = new Point(
+                    Math.Abs((Width + robot.Position.X + robot.Velocity.X) % Width),
+                    Math.Abs((Height + robot.Position.Y + robot.Velocity.Y) % Height)
+                );
+            }
+        }
+
+        // Compute safety factor
+        var safetyFactor =
+            robots.Count(r => r.Position is { X: < WidthCenter, Y: < HeightCenter }) *
+            robots.Count(r => r.Position is { X: > WidthCenter, Y: < HeightCenter }) *
+            robots.Count(r => r.Position is { X: < WidthCenter, Y: > HeightCenter }) *
+            robots.Count(r => r.Position is { X: > WidthCenter, Y: > HeightCenter });
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Safety factor: [yellow]{safetyFactor}[/][/]");
+        }
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+        var robots = ParseRobots();
+
+        var canvas = new Canvas(Width, Height);
+
+        for (var i = 0; i < int.MaxValue; i++)
+        {
+            for (var x = 0; x < Width; x++)
+            {
+                for (var y = 0; y < Height; y++)
+                {
+                    canvas.SetPixel(x, y, Color.Grey23);
+                }
+            }
+
+            foreach (var robot in robots)
+            {
+                robot.Position = new Point(
+                    Math.Abs((Width + robot.Position.X + robot.Velocity.X) % Width),
+                    Math.Abs((Height + robot.Position.Y + robot.Velocity.Y) % Height)
+                );
+
+                canvas.SetPixel(robot.Position.X, robot.Position.Y, Color.Green1);
+            }
+
+            // Display grid
+            if ((i + 1 - 46) % 101 == 0)
+            {
+                AnsiConsole.Write(canvas);
+                AnsiConsole.WriteLine();
+
+                AnsiConsole.Write($"Seconds elapsed: {i + 1}");
+
+                var key = Console.ReadKey(true).Key;
+
+                if (key is ConsoleKey.Enter)
+                {
+                    AnsiConsole.WriteLine();
+                    AnsiConsole.WriteLine();
+                    AnsiConsole.MarkupLine($"[green]Image at instant: [yellow]t={i + 1}s[/][/]");
+
+                    break;
+                }
+
+                AnsiConsole.Clear();
+            }
+        }
+    }
+
+    private List<Robot> ParseRobots()
+    {
+        var robots = new List<Robot>();
+
+        foreach (var line in Input.AsSpan().EnumerateLines())
+        {
+            var positionX = int.Parse(line[(line.IndexOf('=') + 1)..line.IndexOf(',')]);
+            var positionY = int.Parse(line[(line.IndexOf(',') + 1)..line.IndexOf(' ')]);
+
+            var velocityX = int.Parse(line[(line.LastIndexOf('=') + 1)..line.LastIndexOf(',')]);
+            var velocityY = int.Parse(line[(line.LastIndexOf(',') + 1)..]);
+
+            robots.Add(new Robot(new Point(positionX, positionY), new Point(velocityX, velocityY)));
+        }
+
+        return robots;
+    }
+
+    private class Robot(Point position, Point velocity)
+    {
+        public Point Position { get; set; } = position;
+        public Point Velocity { get; } = velocity;
+    }
+
+    private readonly record struct Point(int X, int Y)
+        : IAdditionOperators<Point, Point, Point>,
+            ISubtractionOperators<Point, Point, Point>,
+            IMultiplyOperators<Point, int, Point>
+    {
+        public static Point operator +(Point left, Point right)
+        {
+            return new Point(left.X + right.X, left.Y + right.Y);
+        }
+
+        public static Point operator -(Point left, Point right)
+        {
+            return new Point(left.X - right.X, left.Y - right.Y);
+        }
+
+        public static Point operator *(Point left, int right)
+        {
+            return new Point(left.X * right, left.Y * right);
+        }
+
+        public static Point operator *(int left, Point right)
+        {
+            return new Point(right.X * left, right.Y * left);
+        }
+
+        public static implicit operator Point((int X, int Y) point)
+            => new(point.X, point.Y);
+    }
+}

Days/Day15.cs

@@ -0,0 +1,193 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using System.Text;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day15 : Day
+{
+    public override int Number => 15;
+    public override string Name => "Warehouse Woes";
+
+    private const int Size = 50;
+
+    private const char Wall = '#';
+    private const char Box = 'O';
+    private const char Empty = '.';
+
+    private const char InstructionLeft = '<';
+    private const char InstructionRight = '>';
+    private const char InstructionUp = '^';
+    private const char InstructionDown = 'v';
+
+    public override void RunPart1(bool display = true)
+    {
+        var (map, position, instructions) = ParseMap();
+
+        foreach (var instruction in instructions)
+        {
+            var direction = instruction switch
+            {
+                InstructionLeft => new Point(-1, 0),
+                InstructionRight => new Point(1, 0),
+                InstructionUp => new Point(0, -1),
+                InstructionDown => new Point(0, 1),
+                _ => throw new ArgumentException($"Invalid instruction: {instruction}")
+            };
+
+            var destination = position + direction;
+
+            // Destination is free, just move
+            if (map[destination.X, destination.Y] is not (Wall or Box))
+            {
+                position = destination;
+            }
+            // Destination is a box, check if there is a free space further up and move accordingly
+            else if (map[destination.X, destination.Y] is Box)
+            {
+                var pushTarget = destination + direction;
+
+                while (map[pushTarget.X, pushTarget.Y] is Box)
+                {
+                    pushTarget += direction;
+                }
+
+                // Cannot move anything since there is a wall
+                if (map[pushTarget.X, pushTarget.Y] is Wall)
+                {
+                    continue;
+                }
+
+                // Move robot and boxes (only need to move first and last box of a chain)
+                position = destination;
+
+                map[destination.X, destination.Y] = Empty;
+                map[pushTarget.X, pushTarget.Y] = Box;
+            }
+            // Else destination is a wall, do nothing
+        }
+
+        var coordinatesSum = 0;
+
+        // Count gps coordinates
+        for (var x = 0; x < Size; x++)
+        {
+            for (var y = 0; y < Size; y++)
+            {
+                if (map[x, y] is Box)
+                {
+                    coordinatesSum += 100 * y + x;
+
+                }
+            }
+        }
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Sum of boxes GPS coordinates: [yellow]{coordinatesSum}[/][/]");
+        }
+    }
+
+    private static void DisplayGrid(char[,] map)
+    {
+        for (var y = 0; y < Size; y++)
+        {
+            for (var x = 0; x < Size; x++)
+            {
+                AnsiConsole.Write(map[x, y]);
+            }
+
+            AnsiConsole.WriteLine();
+        }
+
+        AnsiConsole.WriteLine();
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+
+    }
+
+    private (char[,] Map, Point Start, List<char> Instructions) ParseMap()
+    {
+        var readingMap = true;
+
+        var map = new char[Size, Size];
+
+        Point start = default;
+
+        var instructions = new List<char>();
+
+        var y = 0;
+        foreach (var line in Input.AsSpan().EnumerateLines())
+        {
+            if (line.IsWhiteSpace())
+            {
+                readingMap = false;
+
+                continue;
+            }
+
+            if (readingMap)
+            {
+                var x = 0;
+                foreach (var symbol in line)
+                {
+                    map[x, y] = Empty;
+
+                    if (symbol is Wall or Box)
+                    {
+                        map[x, y] = symbol;
+                    }
+                    else if (symbol is '@')
+                    {
+                        start = new Point(x, y);
+                    }
+
+                    x++;
+                }
+
+                y++;
+            }
+            else
+            {
+                foreach (var instruction in line)
+                {
+                    instructions.Add(instruction);
+                }
+            }
+        }
+
+        return (map, start, instructions);
+    }
+
+    private readonly record struct Point(int X, int Y)
+        : IAdditionOperators<Point, Point, Point>,
+            ISubtractionOperators<Point, Point, Point>,
+            IMultiplyOperators<Point, int, Point>
+    {
+        public static Point operator +(Point left, Point right)
+        {
+            return new Point(left.X + right.X, left.Y + right.Y);
+        }
+
+        public static Point operator -(Point left, Point right)
+        {
+            return new Point(left.X - right.X, left.Y - right.Y);
+        }
+
+        public static Point operator *(Point left, int right)
+        {
+            return new Point(left.X * right, left.Y * right);
+        }
+
+        public static Point operator *(int left, Point right)
+        {
+            return new Point(right.X * left, right.Y * left);
+        }
+
+        public static implicit operator Point((int X, int Y) point)
+            => new(point.X, point.Y);
+    }
+}

Days/Day2.cs

@@ -1,5 +1,3 @@
-using System.Runtime.CompilerServices;
-using System.Runtime.InteropServices;
 using Spectre.Console;
 
 namespace AdventOfCode.Days;
@@ -7,223 +5,135 @@ namespace AdventOfCode.Days;
 public class Day2 : Day
 {
     public override int Number => 2;
-    public override string Name => "Gift Shop";
+    public override string Name => "Red-Nosed Reports";
 
     public override void RunPart1(bool display = true)
     {
-        var inputSpan = Input.AsSpan();
-        var sum = 0L;
+        var safeReports = 0;
 
-        // Parse the ranges
-        var idsCount = inputSpan.Count(',') + 1;
-
-        Span<IdRange> idRanges = stackalloc IdRange[idsCount];
-
-        var index = 0;
-        var maxDigits = 0;
-        foreach (var spanRange in inputSpan.Split(','))
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            var span = inputSpan[spanRange];
+            var isSafe = true;
+            var levels = line.Split(' ');
 
-            var separatorIndex = span.IndexOf('-');
-            var lowerBound = long.Parse(span[..separatorIndex]);
-            var upperBound = long.Parse(span[(separatorIndex + 1)..]);
-
-            idRanges[index] = new IdRange(lowerBound, upperBound);
-            index++;
-
-            // Also find the biggest number
-            var digitsCount = CountDigits((ulong) upperBound);
-            if (digitsCount > maxDigits)
+            var previousDirection = 0;
+            var previousLevel = int.MinValue;
+            foreach (var levelRange in levels)
             {
-                maxDigits = digitsCount;
-            }
-        }
+                var level = int.Parse(line[levelRange]);
 
-        // For each possible invalid ID, check if it's in a range
-        var maxSingleId = 1L * (long) Math.Pow(10, Math.Ceiling(maxDigits / 2D)) - 1L;
-        for (var invalidIdSingle = 1L; invalidIdSingle <= maxSingleId; invalidIdSingle++)
-        {
-            // Build invalid ID
-            var invalidId = (invalidIdSingle * (long) Math.Pow(10, (int) Math.Log10(invalidIdSingle) + 1)) + invalidIdSingle;
-
-            // Check if invalid ID is in a range
-            // This could be optimized by building a sorted list of ranges and using binary search
-            foreach (var idRange in idRanges)
-            {
-                if (invalidId >= idRange.Lower && invalidId <= idRange.Upper)
+                // First level, skip to next
+                if (previousLevel == int.MinValue)
                 {
-                    sum += invalidId;
+                    previousLevel = level;
 
+                    continue;
+                }
+
+                // Check that direction is preserved
+                var direction = level - previousLevel;
+
+                if (previousDirection != 0 && Math.Sign(direction) != Math.Sign(previousDirection))
+                {
+                    isSafe = false;
                     break;
                 }
+
+                // Check that distance >= 1 and <= 3
+                if (Math.Abs(direction) is < 1 or > 3)
+                {
+                    isSafe = false;
+                    break;
+                }
+
+                previousLevel = level;
+                previousDirection = direction;
+            }
+
+            if (isSafe)
+            {
+                safeReports++;
             }
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Sum of invalid IDs: [yellow]{sum}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Number of safe reports: [yellow]{safeReports}[/][/]");
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var inputSpan = Input.AsSpan();
-        var sum = 0L;
+        var safeReports = 0;
 
-        // Parse the ranges
-        var idsCount = inputSpan.Count(',') + 1;
-
-        Span<IdRange> idRanges = stackalloc IdRange[idsCount];
-
-        var index = 0;
-        var maxDigits = 0;
-        foreach (var spanRange in inputSpan.Split(','))
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            var span = inputSpan[spanRange];
-
-            var separatorIndex = span.IndexOf('-');
-            var lowerBound = long.Parse(span[..separatorIndex]);
-            var upperBound = long.Parse(span[(separatorIndex + 1)..]);
-
-            idRanges[index] = new IdRange(lowerBound, upperBound);
-            index++;
-
-            // Also find the biggest number
-            var digitsCount = CountDigits((ulong) upperBound);
-            if (digitsCount > maxDigits)
+            if (IsSafe(line))
             {
-                maxDigits = digitsCount;
-            }
-        }
-
-        // For each possible invalid ID, check if it's in a range
-        Span<long> invalidIds = stackalloc long[maxDigits];
-        var visitedIds = new HashSet<long>();
-
-        var maxSingleId = 1L * (long) Math.Pow(10, Math.Ceiling(maxDigits / 2D)) - 1L;
-        for (var invalidIdSingle = 1L; invalidIdSingle <= maxSingleId; invalidIdSingle++)
-        {
-            // Build invalid IDs
-            var filledCount = FillPossibleInvalidIds(invalidIds, invalidIdSingle, maxDigits);
-
-            // Check if invalid ID is in a range
-            // This could be optimized by building a sorted list of ranges and using binary search
-            for (var i = 0; i < filledCount; i++)
-            {
-                var invalidId = invalidIds[i];
-
-                if (visitedIds.Add(invalidId))
-                {
-                    foreach (var idRange in idRanges)
-                    {
-                        if (invalidId >= idRange.Lower && invalidId <= idRange.Upper)
-                        {
-                            sum += invalidId;
-
-                            break;
-                        }
-                    }
-                }
+                safeReports++;
             }
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Sum of invalid IDs: [yellow]{sum}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Number of safe reports: [yellow]{safeReports}[/][/]");
         }
 
         return;
 
-        static int FillPossibleInvalidIds(Span<long> invalidIds, long invalidIdSingle, int maxDigits)
+        bool IsSafe(ReadOnlySpan<char> line, Range? toSkip = null)
         {
-            Span<char> idSpanBuffer = stackalloc char[20];
-            Span<char> target = stackalloc char[maxDigits];
+            var levels = line.Split(' ');
 
-            // Write number to char span
-            invalidIdSingle.TryFormat(idSpanBuffer, out var idLength);
-            var idSpan = idSpanBuffer[..idLength];
+            var previousDirection = 0;
+            var previousLevel = int.MinValue;
+            Range previousLevelRange = default;
+            Range firstLevelRange = default;
 
-            // First part will always be the single id
-            idSpan.CopyTo(target);
-
-            var times = 2;
-            var index = 0;
-            while (true)
+            foreach (var levelRange in levels)
             {
-                var targetSize = idSpan.Length * times;
-
-                // Check if result number would be too big
-                if (targetSize > target.Length)
+                if (levelRange.Equals(toSkip))
                 {
-                    break;
+                    // This level can be skipped using the problem dampener
+                    continue;
                 }
 
-                // Build concatenated string
-                for (var i = 1; i < times; i++)
+                var level = int.Parse(line[levelRange]);
+
+                // First level, skip to next
+                if (previousLevel == int.MinValue)
                 {
-                    idSpan.CopyTo(target[(idSpan.Length * i)..]);
+                    previousLevel = level;
+                    previousLevelRange = levelRange;
+                    firstLevelRange = levelRange;
+
+                    continue;
                 }
 
-                invalidIds[index] = long.Parse(target[..targetSize]);
+                // Check that direction is preserved
+                var direction = level - previousLevel;
 
-                times++;
-                index++;
+                if (previousDirection != 0 && Math.Sign(direction) != Math.Sign(previousDirection))
+                {
+                    // Also try by removing current or previous level if it's first try (problem dampener)
+                    return toSkip is null
+                           && (IsSafe(line, levelRange) || IsSafe(line, previousLevelRange) || IsSafe(line, firstLevelRange));
+                }
+
+                // Check that distance >= 1 and <= 3
+                if (Math.Abs(direction) is < 1 or > 3)
+                {
+                    // Also try by removing current or previous level if it's first try (problem dampener)
+                    return toSkip is null
+                           && (IsSafe(line, levelRange) || IsSafe(line, previousLevelRange) || IsSafe(line, firstLevelRange));
+                }
+
+                previousLevel = level;
+                previousDirection = direction;
+                previousLevelRange = levelRange;
             }
 
-            return index;
+            return true;
         }
     }
-
-    private record struct IdRange(long Lower, long Upper);
-
-    // Source: https://source.dot.net/#System.Private.CoreLib/src/libraries/System.Private.CoreLib/src/System/Buffers/Text/FormattingHelpers.CountDigits.cs,b2bb39bb9360e1d1,references
-    [MethodImpl(MethodImplOptions.AggressiveInlining)]
-    public static int CountDigits(ulong value)
-    {
-        // Map the log2(value) to a power of 10.
-        ReadOnlySpan<byte> log2ToPow10 =
-        [
-            1,  1,  1,  2,  2,  2,  3,  3,  3,  4,  4,  4,  4,  5,  5,  5,
-            6,  6,  6,  7,  7,  7,  7,  8,  8,  8,  9,  9,  9,  10, 10, 10,
-            10, 11, 11, 11, 12, 12, 12, 13, 13, 13, 13, 14, 14, 14, 15, 15,
-            15, 16, 16, 16, 16, 17, 17, 17, 18, 18, 18, 19, 19, 19, 19, 20
-        ];
-
-        nint elementOffset = log2ToPow10[(int)ulong.Log2(value)];
-
-        // Read the associated power of 10.
-        ReadOnlySpan<ulong> powersOf10 =
-        [
-            0, // unused entry to avoid needing to subtract
-            0,
-            10,
-            100,
-            1000,
-            10000,
-            100000,
-            1000000,
-            10000000,
-            100000000,
-            1000000000,
-            10000000000,
-            100000000000,
-            1000000000000,
-            10000000000000,
-            100000000000000,
-            1000000000000000,
-            10000000000000000,
-            100000000000000000,
-            1000000000000000000,
-            10000000000000000000,
-        ];
-
-        ulong powerOf10 = Unsafe.Add(ref MemoryMarshal.GetReference(powersOf10), elementOffset);
-
-        // Return the number of digits based on the power of 10, shifted by 1
-        // if it falls below the threshold.
-        int index = (int)elementOffset;
-
-        return index - (value < powerOf10 ? 1 : 0);
-    }
 }

Days/Day3.cs

@@ -5,116 +5,105 @@ namespace AdventOfCode.Days;
 public class Day3 : Day
 {
     public override int Number => 3;
-    public override string Name => "Lobby";
+    public override string Name => "Mull It Over";
 
     public override void RunPart1(bool display = true)
     {
-        var totalOutputJoltage = 0L;
+        var result = 0;
 
-        Span<int> bank = stackalloc int[100];
+        var input = Input.AsSpan();
+        var mulStart = input.IndexOf("mul(");
 
-        foreach (var line in Input.EnumerateLines())
+        while (mulStart != -1)
         {
-            // Parse the line into battery values
-            for (var i = 0; i < bank.Length; i++)
-            {
-                bank[i] = line[i] - '0';
-            }
+            input = input[(mulStart + 4)..];
 
-            // The first digit the joltage value will be the "left-most" biggest number we can find
-            var firstDigitMax = bank[0];
-            var firstDigitMaxIndex = 0;
+            // Start of a mul operation, search the ending parenthesis and make sure it's before the next mul
+            var mulEnd = input.IndexOf(")");
+            var nextMulStart = input.IndexOf("mul(");
 
-            for (var i = 1; i < bank.Length - 1; i++)
+            if (mulEnd != -1 && (nextMulStart == -1 || mulEnd < nextMulStart))
             {
-                var batteryValue = bank[i];
-                if (batteryValue > firstDigitMax)
+                var operands = input[..mulEnd];
+                var separator = operands.IndexOf(",");
+
+                if (separator != -1
+                    && int.TryParse(operands[..separator], out var left)
+                    && int.TryParse(operands[(separator + 1)..], out var right))
                 {
-                    firstDigitMax = batteryValue;
-                    firstDigitMaxIndex = i;
-
-                    // We cannot have a digit bigger than 9
-                    if (batteryValue is 9)
-                    {
-                        break;
-                    }
+                    result += left * right;
                 }
             }
 
-            // Now we can find the second digit which will be the biggest digit on the right of the first one
-            var secondDigitMax = bank[firstDigitMaxIndex + 1];
-            for (var i = firstDigitMaxIndex + 2; i < bank.Length; i++)
-            {
-                var batteryValue = bank[i];
-
-                if (batteryValue > secondDigitMax)
-                {
-                    secondDigitMax = batteryValue;
-
-                    if (batteryValue is 9)
-                    {
-                        break;
-                    }
-                }
-            }
-
-            // Build the joltage value
-            totalOutputJoltage += firstDigitMax * 10 + secondDigitMax;
+            mulStart = nextMulStart;
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]The total output joltage is: [yellow]{totalOutputJoltage}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Result: [yellow]{result}[/][/]");
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var totalOutputJoltage = 0L;
+        var result = 0;
 
-        Span<int> bank = stackalloc int[100];
+        var input = Input.AsSpan();
+        var mulStart = input.IndexOf("mul(");
 
-        foreach (var line in Input.EnumerateLines())
+        while (mulStart != -1)
         {
-            // Parse the line into battery values
-            for (var i = 0; i < bank.Length; i++)
-            {
-                bank[i] = line[i] - '0';
-            }
+            // Check if there is a "don't()" before next mul
+            var dontStart = input.IndexOf("don't()");
 
-            var maxIndex = -1;
-            for (var digitPosition = 11; digitPosition >= 0; digitPosition--)
+            if (dontStart < mulStart)
             {
-                // Next max is always on the right of previous one
-                maxIndex++;
+                // Search for next "do()"
+                input = input[(dontStart + 7)..];
 
-                // Find biggest battery value on the right
-                var max = bank[maxIndex];
-                for (var i = maxIndex + 1; i < bank.Length - digitPosition; i++)
+                var doStart = input.IndexOf("do()");
+
+                if (doStart == -1)
                 {
-                    var batteryValue = bank[i];
-
-                    if (batteryValue > max)
-                    {
-                        maxIndex = i;
-                        max = batteryValue;
-
-                        // We cannot have a digit bigger than 9
-                        if (batteryValue is 9)
-                        {
-                            break;
-                        }
-                    }
+                    break;
                 }
 
-                // Directly add its value to the total, we don't need to do compound sum
-                totalOutputJoltage += max * (long) Math.Pow(10, digitPosition);
+                input = input[(doStart + 4)..];
+
+                // Update next mult position
+                mulStart = input.IndexOf("mul(");
+
+                if (mulStart == -1)
+                {
+                    break;
+                }
             }
+
+            input = input[(mulStart + 4)..];
+
+            // Start of a mul operation, search the ending parenthesis and make sure it's before the next mul
+            var mulEnd = input.IndexOf(")");
+            var nextMulStart = input.IndexOf("mul(");
+
+            if (mulEnd != -1 && (nextMulStart == -1 || mulEnd < nextMulStart))
+            {
+                var operands = input[..mulEnd];
+                var separator = operands.IndexOf(",");
+
+                if (separator != -1
+                    && int.TryParse(operands[..separator], out var left)
+                    && int.TryParse(operands[(separator + 1)..], out var right))
+                {
+                    result += left * right;
+                }
+            }
+
+            mulStart = nextMulStart;
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]The total output joltage is: [yellow]{totalOutputJoltage}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Result: [yellow]{result}[/][/]");
         }
     }
 }

Days/Day4.cs

@@ -5,152 +5,132 @@ namespace AdventOfCode.Days;
 public class Day4 : Day
 {
     public override int Number => 4;
-    public override string Name => "Printing Department";
-
-    public const int Length = 136;
+    public override string Name => "Ceres Search";
 
     public override void RunPart1(bool display = true)
     {
-        var accessibleRollsOfPaper = 0;
+        var xmasCount = 0;
 
-        var map = ParseMap(Input);
+        var grid = Input.AsCharGrid();
 
-        Span<(int i, int j)> adjacentPositions =
-        [
-            (-1, -1), (-1, 0), (-1, 1),
-            ( 0, -1),              ( 0, 1),
-            ( 1, -1), ( 1, 0), ( 1, 1)
-        ];
-
-        for (var i = 0; i < Length; i++)
+        for (int x = 0; x < grid.GetLength(0); x++)
         {
-            for (var j = 0; j < Length; j++)
+            for (int y = 0; y < grid.GetLength(1); y++)
             {
-                // There is no paper roll at position (i, j)
-                if (!map[i, j])
-                {
-                    continue;
-                }
-
-                // Check if a paper roll is accessible
-                var adjacentRolls = 0;
-                foreach (var adjacentPosition in adjacentPositions)
-                {
-                    var targetI = i + adjacentPosition.i;
-                    var targetJ = j + adjacentPosition.j;
-
-                    // Check that the adjacent position is not out of bounds
-                    if (targetI is < 0 or >= Length || targetJ is < 0 or >= Length)
-                    {
-                        continue;
-                    }
-
-                    if (map[targetI, targetJ])
-                    {
-                        adjacentRolls++;
-                    }
-                }
-
-                if (adjacentRolls < 4)
-                {
-                    accessibleRollsOfPaper++;
-                }
+                xmasCount += CheckXmas(x, y);
             }
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Accessible rolls of paper: [yellow]{accessibleRollsOfPaper}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Number of safe reports: [yellow]{xmasCount}[/][/]");
+        }
+
+        return;
+
+        int CheckXmas(int x, int y)
+        {
+            (int xOffset, int yOffset)[] patterns = [
+                (1, 0),
+                (-1, 0),
+                (0, 1),
+                (0, -1),
+                (1, 1),
+                (1, -1),
+                (-1, 1),
+                (-1, -1)
+            ];
+
+            char[] word = ['X', 'M', 'A', 'S'];
+
+            int count = 0;
+
+            foreach (var pattern in patterns)
+            {
+                bool valid = true;
+
+                for (int i = 0; i < word.Length; i++)
+                {
+                    var xTarget = x + (pattern.xOffset * i);
+                    var yTarget = y + (pattern.yOffset * i);
+
+                    if (xTarget < 0 || xTarget >= grid.GetLength(0)
+                                    || yTarget < 0 || yTarget >= grid.GetLength(1)
+                                    || word[i] != grid[xTarget, yTarget])
+                    {
+                        valid = false;
+
+                        break;
+                    }
+                }
+
+                if (valid)
+                {
+                    count++;
+                }
+            }
+
+            return count;
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var accessibleRollsOfPaper = 0;
+        var xmasCount = 0;
 
-        var map = ParseMap(Input);
+        var grid = Input.AsCharGrid();
 
-        Span<(int i, int j)> adjacentPositions =
-        [
-            (-1, -1), (-1, 0), (-1, 1),
-            ( 0, -1),              ( 0, 1),
-            ( 1, -1), ( 1, 0), ( 1, 1)
-        ];
-
-        int removedRollsOfPaper;
-        // Loop until we cannot remove any roll anymore
-        do
+        for (int x = 0; x < grid.GetLength(0); x++)
         {
-            removedRollsOfPaper = 0;
-
-            for (var i = 0; i < Length; i++)
+            for (int y = 0; y < grid.GetLength(1); y++)
             {
-                for (var j = 0; j < Length; j++)
-                {
-                    // There is no paper roll at position (i, j)
-                    if (!map[i, j])
-                    {
-                        continue;
-                    }
-
-                    // Check if a paper roll is accessible
-                    var adjacentRolls = 0;
-                    foreach (var adjacentPosition in adjacentPositions)
-                    {
-                        var targetI = i + adjacentPosition.i;
-                        var targetJ = j + adjacentPosition.j;
-
-                        // Check that the adjacent position is not out of bounds
-                        if (targetI is < 0 or >= Length || targetJ is < 0 or >= Length)
-                        {
-                            continue;
-                        }
-
-                        if (map[targetI, targetJ])
-                        {
-                            adjacentRolls++;
-                        }
-                    }
-
-                    if (adjacentRolls < 4)
-                    {
-                        removedRollsOfPaper++;
-
-                        // Remove roll of paper
-                        map[i, j] = false;
-                    }
-                }
+                xmasCount += CheckXmas(x, y);
             }
-
-            accessibleRollsOfPaper += removedRollsOfPaper;
-        } while (removedRollsOfPaper > 0);
+        }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Accessible rolls of paper: [yellow]{accessibleRollsOfPaper}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Number of safe reports: [yellow]{xmasCount}[/][/]");
         }
-    }
 
-    private static bool[,] ParseMap(string input)
-    {
-        // Map is a  square
-        var map = new bool[Length, Length];
+        return;
 
-        var i = 0;
-        foreach (var line in input.EnumerateLines())
+        int CheckXmas(int x, int y)
         {
-            var j = 0;
+            ((int xOffset, int yOffset) first, (int xOffset, int yOffset) second)[] patterns = [
+                ((-1, -1), (-1, 1)),
+                ((-1, -1), (1, -1)),
+                ((1, -1), (1, 1)),
+                ((1, 1), (-1, 1))
+            ];
 
-            foreach (var value in line)
+            char[] word = ['M', 'S'];
+
+            // Center element of the cross must be an 'A'
+            if (grid[x, y] != 'A')
             {
-                map[i, j] = value is '@';
-
-                j++;
+                return 0;
             }
 
-            i++;
-        }
+            // Make sure we're not going out of bounds
+            if (x - 1 < 0 || x + 1 >= grid.GetLength(0) ||
+                y - 1 < 0 || y + 1 >= grid.GetLength(1))
+            {
+                return 0;
+            }
 
-        return map;
+            int count = 0;
+
+            foreach (var (first, second) in patterns)
+            {
+                if (grid[x + first.xOffset, y + first.yOffset] is 'M' && grid[x - first.xOffset, y - first.yOffset] is 'S' &&
+                    grid[x + second.xOffset, y + second.yOffset] is 'M' && grid[x - second.xOffset, y - second.yOffset] is 'S')
+                {
+                    count++;
+                }
+            }
+
+            return count;
+        }
     }
 }

Days/Day5.cs

@@ -5,129 +5,117 @@ namespace AdventOfCode.Days;
 public class Day5 : Day
 {
     public override int Number => 5;
-    public override string Name => "Cafeteria";
+    public override string Name => "Print Queue";
 
     public override void RunPart1(bool display = true)
     {
-        var freshIngredients = 0;
-        var idRanges = new List<IdRange>();
+        var result = 0;
 
-        var readingRanges = true;
-        foreach (var line in Input.EnumerateLines())
+        var precedences = new HashSet<int>?[100];
+
+        var readingPrecedences = true;
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            // Read ranges
-            if (readingRanges)
+            if (line.IsWhiteSpace())
             {
-                // End of ranges
-                if (line.IsWhiteSpace())
+                readingPrecedences = false;
+
+                continue;
+            }
+
+            if (readingPrecedences)
+            {
+                var split = line.Split('|');
+                split.MoveNext();
+
+                var ruleTarget = int.Parse(line[split.Current]);
+
+                split.MoveNext();
+
+                var ruleNumber = int.Parse(line[split.Current]);
+
+                if (precedences[ruleTarget] is not { } precedenceSet)
                 {
-                    readingRanges = false;
-
-                    continue;
+                    precedenceSet = [ ruleNumber ];
+                    precedences[ruleTarget] = precedenceSet;
+                }
+                else
+                {
+                    precedenceSet.Add(ruleNumber);
                 }
-
-                var rangeSeparatorIndex = line.IndexOf('-');
-                var lower = long.Parse(line[..rangeSeparatorIndex]);
-                var upper = long.Parse(line[(rangeSeparatorIndex + 1)..]);
-
-                idRanges.Add(new IdRange(lower, upper));
             }
             else
             {
-                // Read ingredients
-                var ingredientId = long.Parse(line);
-                if (idRanges.Any(range => ingredientId >= range.Lower && ingredientId <= range.Upper))
-                {
-                    freshIngredients++;
-                }
+                result += CheckLine(line);
             }
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Fresh ingredients count: [yellow]{freshIngredients}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Sum of middle page numbers: [yellow]{result}[/][/]");
+        }
+
+        return;
+
+        int CheckLine(ReadOnlySpan<char> line)
+        {
+            Span<int> positions = stackalloc int[100];
+
+            // Read line to get positions
+            var position = 1;
+            foreach (var range in line.Split(','))
+            {
+                var number = int.Parse(line[range]);
+
+                positions[number] = position;
+
+                position++;
+            }
+
+            var middlePosition = (position - 1) / 2;
+            var middleNumber = 0;
+
+            var index = 0;
+            // Check if positions respect precedence rules
+            foreach (var range in line.Split(','))
+            {
+                var number = int.Parse(line[range]);
+
+                // Fetch middle number
+                if (index == middlePosition)
+                {
+                    middleNumber = number;
+                }
+                index++;
+
+                if (precedences[number] is not { } precedenceSet)
+                {
+                    continue;
+                }
+
+                var numberPosition = positions[number];
+
+                // Check all precedence rules for numbers in the list
+                foreach (var nextNumber in precedenceSet)
+                {
+                    var nextNumberPosition = positions[nextNumber];
+
+                    if (nextNumberPosition != 0 && numberPosition >= nextNumberPosition)
+                    {
+                        return 0;
+                    }
+                }
+            }
+
+            return middleNumber;
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var idRanges = new List<IdRange>();
-        var rangesToDelete = new List<IdRange>();
-
-        // Read ranges
-        foreach (var line in Input.EnumerateLines())
-        {
-            // End of ranges
-            if (line.IsWhiteSpace())
-            {
-                break;
-            }
-
-            var rangeSeparatorIndex = line.IndexOf('-');
-            var lower = long.Parse(line[..rangeSeparatorIndex]);
-            var upper = long.Parse(line[(rangeSeparatorIndex + 1)..]);
-
-            // Simplify ranges if there is overlap
-            rangesToDelete.Clear();
-            var skipRange = false;
-            foreach (var idRange in idRanges)
-            {
-                // Distinct
-                if (lower > idRange.Upper || upper < idRange.Lower)
-                {
-                    continue;
-                }
-
-                // Outer overlap
-                if (lower >= idRange.Lower && upper <= idRange.Upper)
-                {
-                    skipRange = true;
-
-                    break;
-                }
-
-                // Inner overlap
-                if (lower <= idRange.Lower && upper >= idRange.Upper)
-                {
-                    rangesToDelete.Add(idRange);
-                }
-
-                // Left overlap
-                if (lower >= idRange.Lower && lower <= idRange.Upper)
-                {
-                    lower = idRange.Lower;
-
-                    rangesToDelete.Add(idRange);
-                }
-
-                // Right overlap
-                if (upper >= idRange.Lower && upper <= idRange.Upper)
-                {
-                    upper = idRange.Upper;
-
-
-                    rangesToDelete.Add(idRange);
-                }
-            }
-
-            if (!skipRange)
-            {
-                foreach (var idRange in rangesToDelete)
-                {
-                    idRanges.Remove(idRange);
-                }
-
-                idRanges.Add(new IdRange(lower, upper));
-            }
-        }
-
-        var freshIngredients = idRanges.Sum(range => (range.Upper - range.Lower) + 1);
-
-        if (display)
-        {
-            AnsiConsole.MarkupLine($"[green]Fresh ingredients count: [yellow]{freshIngredients}[/][/]");
-        }
+        // if (display)
+        // {
+        //     AnsiConsole.MarkupLine($"[green]Number of safe reports: [yellow]{xmasCount}[/][/]");
+        // }
     }
-
-    private record struct IdRange(long Lower, long Upper);
 }

Days/Day6.cs

@@ -1,4 +1,3 @@
-using System.Buffers;
 using System.Numerics;
 using Spectre.Console;
 
@@ -7,203 +6,189 @@ namespace AdventOfCode.Days;
 public class Day6 : Day
 {
     public override int Number => 6;
-    public override string Name => "Trash Compactor";
+    public override string Name => "Guard Gallivant";
 
-    private static SearchValues<char> DigitsSearchValue = SearchValues.Create(
-        '0', '1', '2', '3', '4', '5', '6', '7', '8', '9'
-    );
+    private const int GridSize = 130;
+
+    private static readonly Point DirectionUp = new(0, -1);
+    private static readonly Point DirectionDown = new(0, 1);
+    private static readonly Point DirectionLeft = new(-1, 0);
+    private static readonly Point DirectionRight = new(1, 0);
 
     public override void RunPart1(bool display = true)
     {
-        long grandTotal = 0;
-        var numberRows = new List<List<long>>(4);
-        var symbolRow = new List<char>();
+        HashSet<Point> visited = [];
+        var direction = DirectionUp;
 
-        var rowIndex = 0;
-        foreach (var line in Input.EnumerateLines())
+        var (obstaclesGrid, position) = ReadInputGrid();
+
+        visited.Add(position);
+
+        // Move the guard till it leaves the grid
+        while (true)
         {
-            if (rowIndex <= 3)
+            var destination = position + direction;
+
+            if (destination.X is < 0 or >= GridSize ||
+                destination.Y is < 0 or >= GridSize)
             {
-                numberRows.Add([]);
+                break;
             }
 
-            foreach (var range in line.Split(' '))
+            // Check if it's possible to move or if there is an obstacle
+            if (obstaclesGrid[destination.X, destination.Y])
             {
-                var span = line[range];
+                direction = NextDirection(direction);
 
-                // Ignore split columns
-                if (span.IsWhiteSpace())
-                {
-                    continue;
-                }
-
-                // Numbers
-                if (rowIndex <= 3)
-                {
-                    numberRows[rowIndex].Add(int.Parse(span));
-                }
-                // Symbols
-                else
-                {
-                    symbolRow.Add(span.Trim()[0]);
-                }
+                continue;
             }
 
-            rowIndex++;
-        }
+            position = destination;
 
-        // Do the calculations
-        var count = numberRows[0].Count;
-        for (var i = 0; i < count; i++)
-        {
-            checked
-            {
-                grandTotal += symbolRow[i] switch
-                {
-                    '+' => numberRows[0][i] + numberRows[1][i] + numberRows[2][i] + numberRows[3][i],
-                    '*' => numberRows[0][i] * numberRows[1][i] * numberRows[2][i] * numberRows[3][i],
-                    _ => throw new ArgumentOutOfRangeException()
-                };
-            }
+            visited.Add(position);
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]The grand total is: [yellow]{grandTotal}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Amount of distinct positions: [yellow]{visited.Count}[/][/]");
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        long grandTotal = 0L;
-        var numberRows = new List<List<long>>(4);
-        var symbolRow = new List<char>();
+        var possibleLoops = 0;
+        var (initialGrid, startPosition) = ReadInputGrid();
 
-        var lines = Input.Split(Environment.NewLine);
-
-        for (var i = 0; i < 4; i++)
+        for (var y = 0; y < GridSize; y++)
         {
-            numberRows.Add([]);
-        }
-
-        var offset = 0;
-        while (offset < lines[0].Length)
-        {
-            // Find offset at which the next set of numbers stop
-            var numbersEnd = offset + 1;
-            var foundSpaceColumn = false;
-            while (!foundSpaceColumn)
+            for (var x = 0; x < GridSize; x++)
             {
-                foreach (var line in lines)
+                // Store obstacle state
+                var initialState = initialGrid[x, y];
+
+                // Check if grid is a loop after adding an obstacle there
+                initialGrid[x, y] = true;
+
+                if (IsLoop(initialGrid, startPosition))
                 {
-                    // If any line does not contain a space, we can go next offset
-                    if (line[numbersEnd] is not ' ')
-                    {
-                        numbersEnd++;
-                        foundSpaceColumn = false;
-
-                        break;
-                    }
-
-                    foundSpaceColumn = true;
+                    possibleLoops++;
                 }
+
+                // Restore obstacle state
+                initialGrid[x, y] = initialState;
             }
-
-            for (var i = 0; i < numberRows.Count; i++)
-            {
-                var span = lines[i].AsSpan()[offset..numbersEnd];
-
-                // Parse number with correct offset
-                var lastPaddingIndex = span.LastIndexOfAnyExcept(DigitsSearchValue);
-                var lastDigitIndex = span.LastIndexOfAny(DigitsSearchValue);
-
-                if (lastPaddingIndex > lastDigitIndex)
-                {
-                    numberRows[i].Add(long.Parse(span) * (int)Math.Pow(10, lastPaddingIndex - lastDigitIndex));
-                }
-                else
-                {
-                    numberRows[i].Add(long.Parse(span));
-                }
-            }
-
-            // Also get the symbol
-            symbolRow.Add(lines[4][offset]);
-
-            // Next pack of numbers starts after the space column
-            offset = numbersEnd + 1;
-        }
-
-        // Do the calculations
-        Span<long> numbersBuffer = stackalloc long[4];
-        var count = numberRows[0].Count;
-        for (var i = 0; i < count; i++)
-        {
-            numbersBuffer[0] = numberRows[0][i];
-            numbersBuffer[1] = numberRows[1][i];
-            numbersBuffer[2] = numberRows[2][i];
-            numbersBuffer[3] = numberRows[3][i];
-
-            NumbersToRtl(numbersBuffer);
-
-            grandTotal += symbolRow[i] switch
-            {
-                '+' => numbersBuffer[0] + numbersBuffer[1] + numbersBuffer[2] + numbersBuffer[3],
-                '*' => ValueOrIdentity(numbersBuffer[0]) * ValueOrIdentity(numbersBuffer[1]) * ValueOrIdentity(numbersBuffer[2]) * ValueOrIdentity(numbersBuffer[3]),
-                _ => throw new ArgumentOutOfRangeException()
-            };
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]The grand total is: [yellow]{grandTotal}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Amount of possible loop positions: [yellow]{possibleLoops}[/][/]");
         }
 
         return;
 
-        void NumbersToRtl(Span<long> numbers)
+        bool IsLoop(bool[,] obstaclesGrid, Point position)
         {
-            Span<char> number0 = stackalloc char[4];
-            Span<char> number1 = stackalloc char[4];
-            Span<char> number2 = stackalloc char[4];
-            Span<char> number3 = stackalloc char[4];
+            HashSet<(Point position, Point direction)> visited = [];
+            var direction = DirectionUp;
 
-            numbers[0].TryFormat(number0, out _, "D4");
-            numbers[1].TryFormat(number1, out _, "D4");
-            numbers[2].TryFormat(number2, out _, "D4");
-            numbers[3].TryFormat(number3, out _, "D4");
+            visited.Add((position, direction));
 
-            // Reconstruct numbers
-            for (var i = 0; i < 4; i++)
+            // Move the guard till it loops or leaves the grid
+            while (true)
             {
-                var number = 0;
+                var destination = position + direction;
 
-                if (number0[i] - '0' is not 0 and var digit0)
+                if (visited.Contains((destination, direction)))
                 {
-                    number = digit0;
+                    return true;
                 }
 
-                if (number1[i] - '0' is not 0 and var digit1)
+                if (destination.X is < 0 or >= GridSize || destination.Y is < 0 or >= GridSize)
                 {
-                    number = (number * 10) + digit1;
+                    return false;
                 }
 
-                if (number2[i] - '0' is not 0 and var digit2)
+                // Check if it's possible to move or if there is an obstacle
+                if (obstaclesGrid[destination.X, destination.Y])
                 {
-                    number = (number * 10) + digit2;
+                    direction = NextDirection(direction);
+
+                    continue;
                 }
 
-                if (number3[i] - '0' is not 0 and var digit3)
-                {
-                    number = (number * 10) + digit3;
-                }
+                position = destination;
 
-                numbers[i] = number;
+                visited.Add((position, direction));
             }
         }
+    }
 
-        long ValueOrIdentity(long value) => value is 0
-            ? 1
-            : value;
+    private (bool[,] ObstaclesGrid, Point Start) ReadInputGrid()
+    {
+        var grid = new bool[GridSize, GridSize];
+        Point start = default;
+
+        var y = 0;
+        foreach (var line in Input.AsSpan().EnumerateLines())
+        {
+            var x = 0;
+
+            foreach (var symbol in line)
+            {
+                if (symbol == '^')
+                {
+                    start = new Point(x, y);
+
+                    grid[x, y] = false;
+                }
+                else
+                {
+                    grid[x, y] = symbol switch
+                    {
+                        '#' => true,
+                        _ => false
+                    };
+                }
+
+                x++;
+            }
+
+            y++;
+        }
+
+        return (grid, start);
+    }
+
+    private static Point NextDirection(Point direction)
+    {
+        if (direction == DirectionUp)
+        {
+            return DirectionRight;
+        }
+
+        if (direction == DirectionRight)
+        {
+            return DirectionDown;
+        }
+
+        if (direction == DirectionDown)
+        {
+            return DirectionLeft;
+        }
+
+        if (direction == DirectionLeft)
+        {
+            return DirectionUp;
+        }
+
+        throw new ArgumentException("Invalid direction", nameof(direction));
+    }
+
+    private readonly record struct Point(int X, int Y) : IAdditionOperators<Point, Point, Point>
+    {
+        public static Point operator +(Point left, Point right)
+        {
+            return new Point(left.X + right.X, left.Y + right.Y);
+        }
     }
 }

Days/Day7.cs

@@ -1,5 +1,3 @@
-using System.Buffers;
-using System.Numerics;
 using Spectre.Console;
 
 namespace AdventOfCode.Days;
@@ -7,169 +5,115 @@ namespace AdventOfCode.Days;
 public class Day7 : Day
 {
     public override int Number => 7;
-    public override string Name => "Laboratories";
-
-    public const int Width = 141;
-    public const int Height = 142;
+    public override string Name => "Bridge Repair";
 
     public override void RunPart1(bool display = true)
     {
-        var splitCount = 0;
+        var calibrationResult = 0L;
 
-        var splittersMap = ParseSplittersMap(Input, out var startPosition);
-
-        var beams = new HashSet<Position>();
-        var nextLineBeams = new List<Position>();
-        var usedSplitters = new HashSet<Position>();
-        beams.Add(startPosition with { I = startPosition.I + 1 });
-
-        // Simulate beams going down
-        var row = 1;
-        while (row < Height - 1)
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            foreach (var beamPosition in beams)
+            // Read input equation
+            var equationStart = line.IndexOf(':');
+
+            var target = long.Parse(line[..equationStart]);
+
+            var numbers = new List<long>();
+            var equationNumbers = line[(equationStart + 2)..];
+
+            foreach (var range in equationNumbers.Split(' '))
             {
-                var targetPosition = beamPosition with { I = beamPosition.I + 1 };
-
-                // There is nothing below
-                if (!splittersMap[targetPosition.I, targetPosition.J])
-                {
-                    nextLineBeams.Add(targetPosition);
-                }
-                // There is a splitter, only counts it if not already used
-                else if (usedSplitters.Add(targetPosition))
-                {
-                    splitCount++;
-
-                    // Left and right beam
-                    if (targetPosition.J - 1 >= 0)
-                    {
-                        nextLineBeams.Add(targetPosition with { J = targetPosition.J - 1 });
-                    }
-
-                    if (targetPosition.J + 1 < Width)
-                    {
-                        nextLineBeams.Add(targetPosition with { J = targetPosition.J + 1 });
-                    }
-                }
+                numbers.Add(int.Parse(equationNumbers[range]));
             }
 
-            // Always delete current line beams since we iterate from top to bottom
-            beams.Clear();
-            foreach (var nextLineBeam in nextLineBeams)
+            // Check if equation is possible
+            if (CheckEquation(target, numbers.ToArray().AsSpan()[1..], numbers[0]))
             {
-                beams.Add(nextLineBeam);
+                calibrationResult += target;
             }
-            nextLineBeams.Clear();
-
-            // Also clear the used splitters list for next line
-            usedSplitters.Clear();
-
-            row++;
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Beam split count: [yellow]{splitCount}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Total calibration result: [yellow]{calibrationResult}[/][/]");
+        }
+
+        return;
+
+        bool CheckEquation(long target, ReadOnlySpan<long> numbers, long result)
+        {
+            // Early return when result is greater than target because result is increasing
+            if (result > target)
+            {
+                return false;
+            }
+
+            if (numbers.IsEmpty)
+            {
+                return result == target;
+            }
+
+            var sumResult = result + numbers[0];
+            var multiplyResult = result * numbers[0];
+
+            return CheckEquation(target, numbers[1..], sumResult)
+                   || CheckEquation(target, numbers[1..], multiplyResult);
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var splittersMap = ParseSplittersMap(Input, out var startPosition);
+        var calibrationResult = 0L;
 
-        var quantumPositions = new Dictionary<Position, long>();
-        var nextQuantumPositions = new Dictionary<Position, long>();
-        quantumPositions.Add(startPosition with { I = startPosition.I + 1 }, 1L);
-
-        // Simulate beams going down for each timeline
-        var row = 1;
-        while (row < Height - 1)
+        foreach (var line in Input.AsSpan().EnumerateLines())
         {
-            // Simulation step
-            foreach (var (beamPosition, timelinesCount) in quantumPositions)
+            // Read input equation
+            var equationStart = line.IndexOf(':');
+
+            var target = long.Parse(line[..equationStart]);
+
+            var numbers = new List<long>();
+            var equationNumbers = line[(equationStart + 2)..];
+
+            foreach (var range in equationNumbers.Split(' '))
             {
-                var targetPosition = beamPosition with { I = beamPosition.I + 1 };
-
-                // There is nothing below, keep going down
-                if (!splittersMap[targetPosition.I, targetPosition.J])
-                {
-                    UpdateTimelines(nextQuantumPositions, targetPosition, timelinesCount);
-                }
-                else
-                {
-                    // Left and right beams
-                    var leftBeamPosition = targetPosition with { J = targetPosition.J - 1 };
-                    var rightBeamPosition = targetPosition with { J = targetPosition.J + 1 };
-
-                    UpdateTimelines(nextQuantumPositions, leftBeamPosition, timelinesCount);
-                    UpdateTimelines(nextQuantumPositions, rightBeamPosition, timelinesCount);
-                }
+                numbers.Add(int.Parse(equationNumbers[range]));
             }
 
-            // Always delete current line beams since we iterate from top to bottom
-            quantumPositions.Clear();
-            foreach (var nextQuantumPosition in nextQuantumPositions)
+            // Check if equation is possible
+            if (CheckEquation(target, numbers.ToArray().AsSpan()[1..], numbers[0]))
             {
-                quantumPositions.Add(nextQuantumPosition.Key, nextQuantumPosition.Value);
+                calibrationResult += target;
             }
-            nextQuantumPositions.Clear();
-
-            row++;
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Timelines count: [yellow]{quantumPositions.Sum(p => p.Value)}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Total calibration result: [yellow]{calibrationResult}[/][/]");
         }
 
         return;
 
-        // Update and merge timelines
-        static void UpdateTimelines(Dictionary<Position, long> nextQuantumPositions, Position targetPosition, long timelinesCount)
+        bool CheckEquation(long target, ReadOnlySpan<long> numbers, long result)
         {
-            // Merge timelines if there is already one for this target position
-            if (nextQuantumPositions.TryGetValue(targetPosition, out var otherTimelinesCount))
+            // Early return when result is greater than target because result is increasing
+            if (result > target)
             {
-                nextQuantumPositions[targetPosition] = otherTimelinesCount + timelinesCount;
+                return false;
             }
-            // No timelines to merge, no new timeline
-            else
+
+            if (numbers.IsEmpty)
             {
-                nextQuantumPositions[targetPosition] = timelinesCount;
+                return result == target;
             }
+
+            var sumResult = result + numbers[0];
+            var multiplyResult = result * numbers[0];
+            var concatResult = result * (int)Math.Pow(10, (int)Math.Log10(numbers[0]) + 1) + numbers[0];
+
+            return CheckEquation(target, numbers[1..], sumResult)
+                   || CheckEquation(target, numbers[1..], multiplyResult)
+                   || CheckEquation(target, numbers[1..], concatResult);
         }
     }
-
-    private static bool[,] ParseSplittersMap(string input, out Position startPosition)
-    {
-        var map = new bool[Height, Width];
-        startPosition = new Position(0, 0);
-
-        var i = 0;
-        foreach (var line in input.EnumerateLines())
-        {
-            var j = 0;
-            foreach (var symbol in line)
-            {
-                // Find start
-                if (symbol is 'S')
-                {
-                    startPosition = new Position(i, j);
-
-                    continue;
-                }
-
-                map[i, j] = symbol is '^';
-
-                j++;
-            }
-
-            i++;
-        }
-
-        return map;
-    }
-
-    private record Position(int I, int J);
 }

Days/Day8.cs

@@ -1,4 +1,4 @@
-using System.Buffers;
+using System.Collections.Frozen;
 using System.Numerics;
 using Spectre.Console;
 
@@ -7,215 +7,163 @@ namespace AdventOfCode.Days;
 public class Day8 : Day
 {
     public override int Number => 8;
-    public override string Name => "Playground";
+    public override string Name => "Resonant Collinearity";
+
+    private const int GridSize = 50;
 
     public override void RunPart1(bool display = true)
     {
-        var boxPositions = ParseBoxPositions(Input);
-        var boxPairDistances = FetchOrderedDistances(boxPositions);
+        HashSet<Point> antinodePositions = [];
 
-        var circuits = new List<HashSet<Box>>();
+        var frequencyAntennas = ParseAntennas();
 
-        var connectionsCount = 0;
-
-        while (connectionsCount < 1000)
+        // Find antinodes for each frequency
+        foreach (var (_, antennas) in frequencyAntennas)
         {
-            // Fetch next minimal distance pair. This is always the last pair in our ordered list
-            var (pairLeftBox, pairRightBox, _) = boxPairDistances[^1];
-            boxPairDistances.RemoveAt(boxPairDistances.Count - 1);
-
-            // Create a connection if those two boxes are not already connected
-            if (!ConnectionExists(circuits, pairLeftBox, pairRightBox))
+            // Take antennas by pair to find antinodes
+            foreach (var firstAntenna in antennas)
             {
-                // Connect the boxes, eventually merging circuits
-                ConnectBoxes(circuits, pairLeftBox, pairRightBox);
+                foreach (var secondAntenna in antennas.Where(a => a != firstAntenna))
+                {
+                    var firstAntinode = firstAntenna + (firstAntenna - secondAntenna);
+                    var secondAntinode = secondAntenna + (secondAntenna - firstAntenna);
+
+                    if (firstAntinode is { X: >= 0 and < GridSize, Y: >= 0 and < GridSize })
+                    {
+                        antinodePositions.Add(firstAntinode);
+                    }
+
+                    if (secondAntinode is { X: >= 0 and < GridSize, Y: >= 0 and < GridSize })
+                    {
+                        antinodePositions.Add(secondAntinode);
+                    }
+                }
             }
-
-            connectionsCount++;
         }
 
-        var result = circuits
-            .OrderByDescending(circuit => circuit.Count)
-            .Take(3)
-            .Aggregate(1, (product, circuit) => product * circuit.Count);
-
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Result is: [yellow]{result}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Unique antinode positions count: [yellow]{antinodePositions.Count}[/][/]");
         }
     }
 
     public override void RunPart2(bool display = true)
     {
-        var boxPositions = ParseBoxPositions(Input);
-        var boxPairDistances = FetchOrderedDistances(boxPositions);
+        HashSet<Point> antinodePositions = [];
 
-        var circuits = new List<HashSet<Box>>();
+        var frequencyAntennas = ParseAntennas();
 
-        long result;
-        while (true)
+        // Find antinodes for each frequency
+        foreach (var (_, antennas) in frequencyAntennas)
         {
-            // Fetch next minimal distance pair. This is always the last pair in our ordered list
-            var (pairLeftBox, pairRightBox, _) = boxPairDistances[^1];
-            boxPairDistances.RemoveAt(boxPairDistances.Count - 1);
-
-            // Create a connection if those two boxes are not already connected
-            if (!ConnectionExists(circuits, pairLeftBox, pairRightBox))
+            // Take antennas by pair to find antinodes
+            foreach (var firstAntenna in antennas)
             {
-                // Connect the boxes, eventually merging circuits
-                ConnectBoxes(circuits, pairLeftBox, pairRightBox);
-            }
+                foreach (var secondAntenna in antennas.Where(a => a != firstAntenna))
+                {
+                    // Always add antinodes on antennas if a pair is formed
+                    antinodePositions.Add(firstAntenna);
+                    antinodePositions.Add(secondAntenna);
 
-            // Check if there is a circuit with all boxes connected
-            if (circuits[0].Count >= 1000)
-            {
-                result = pairLeftBox.X * pairRightBox.X;
-                break;
+                    // Compute potential antinode positions
+                    var firstAntinodeOffset = firstAntenna - secondAntenna;
+                    var secondAntinodeOffset = secondAntenna - firstAntenna;
+
+                    for (var i = 1; ; i++)
+                    {
+                        var firstAntinode = firstAntenna + (i * firstAntinodeOffset);
+
+                        if (firstAntinode is { X: >= 0 and < GridSize, Y: >= 0 and < GridSize })
+                        {
+                            antinodePositions.Add(firstAntinode);
+                        }
+                        else
+                        {
+                            break;
+                        }
+                    }
+
+                    for (var i = 1; ; i++)
+                    {
+                        var secondAntinode = secondAntenna + (i * secondAntinodeOffset);
+
+                        if (secondAntinode is { X: >= 0 and < GridSize, Y: >= 0 and < GridSize })
+                        {
+                            antinodePositions.Add(secondAntinode);
+                        }
+                        else
+                        {
+                            break;
+                        }
+                    }
+                }
             }
         }
 
         if (display)
         {
-            AnsiConsole.MarkupLine($"[green]Result is: [yellow]{result}[/][/]");
+            AnsiConsole.MarkupLine($"[green]Unique antinode positions count: [yellow]{antinodePositions.Count}[/][/]");
         }
     }
 
-    private static double BoxDistance(Box left, Box right)
+    private FrozenDictionary<char, List<Point>> ParseAntennas()
     {
-        return Math.Sqrt(
-            (right.X - left.X) * (right.X - left.X) +
-            (right.Y - left.Y) * (right.Y - left.Y) +
-            (right.Z - left.Z) * (right.Z - left.Z)
-        );
+        var antennas = new Dictionary<char, List<Point>>();
+
+        var y = 0;
+        foreach (var line in Input.AsSpan().EnumerateLines())
+        {
+            var x = 0;
+
+            foreach (var frequency in line)
+            {
+                if (frequency is '.')
+                {
+                    x++;
+
+                    continue;
+                }
+
+                if (!antennas.TryGetValue(frequency, out var list))
+                {
+                    list = [];
+                    antennas[frequency] = list;
+                }
+
+                list.Add(new Point(x, y));
+
+                x++;
+            }
+
+            y++;
+        }
+
+        return antennas.ToFrozenDictionary();
     }
 
-    static bool ConnectionExists(List<HashSet<Box>> circuits, Box left, Box right)
+    private readonly record struct Point(int X, int Y)
+        : IAdditionOperators<Point, Point, Point>,
+            ISubtractionOperators<Point, Point, Point>,
+            IMultiplyOperators<Point, int, Point>
     {
-        foreach (var circuit in circuits)
+        public static Point operator +(Point left, Point right)
         {
-            if (circuit.Contains(left) && circuit.Contains(right))
-            {
-                return true;
-            }
+            return new Point(left.X + right.X, left.Y + right.Y);
         }
 
-        return false;
-    }
-
-    static void ConnectBoxes(List<HashSet<Box>> circuits, Box pairLeftBox, Box pairRightBox)
-    {
-        // Try to find circuit containing each box
-        HashSet<Box>? leftCircuit = null;
-        HashSet<Box>? rightCircuit = null;
-
-        foreach (var circuit in circuits)
+        public static Point operator -(Point left, Point right)
         {
-            if (circuit.Contains(pairLeftBox))
-            {
-                leftCircuit = circuit;
-            }
-
-            if (circuit.Contains(pairRightBox))
-            {
-                rightCircuit = circuit;
-            }
+            return new Point(left.X - right.X, left.Y - right.Y);
         }
 
-        // None is in a circuit, create a new one
-        if (leftCircuit is null && rightCircuit is null)
+        public static Point operator *(Point left, int right)
         {
-            var circuit = new HashSet<Box>
-            {
-                pairLeftBox,
-                pairRightBox
-            };
-
-            circuits.Add(circuit);
-        }
-        // One of the two is null
-        else if (leftCircuit is not null && rightCircuit is null)
-        {
-            leftCircuit.Add(pairRightBox);
-        }
-        else if (leftCircuit is null && rightCircuit is not null)
-        {
-            rightCircuit.Add(pairLeftBox);
-        }
-        // Both are already in a circuit, merge them
-        else
-        {
-            foreach (var box in rightCircuit!)
-            {
-                leftCircuit!.Add(box);
-            }
-
-            circuits.Remove(rightCircuit);
-        }
-    }
-
-    private static List<Box> ParseBoxPositions(string input)
-    {
-        var positions = new List<Box>();
-
-        foreach (var line in input.EnumerateLines())
-        {
-            var split = line.Split(',');
-
-            split.MoveNext();
-            var x = long.Parse(line[split.Current]);
-
-            split.MoveNext();
-            var y = long.Parse(line[split.Current]);
-
-            split.MoveNext();
-            var z = long.Parse(line[split.Current]);
-
-            positions.Add(new Box(x, y, z));
+            return new Point(left.X * right, left.Y * right);
         }
 
-        return positions;
-    }
-
-    private static List<BoxPairDistance> FetchOrderedDistances(List<Box> boxes)
-    {
-        var boxPairDistances = new List<BoxPairDistance>();
-
-        for (var i = 0; i < boxes.Count - 1; i++)
+        public static Point operator *(int left, Point right)
         {
-            for (var j = i + 1; j < boxes.Count; j++)
-            {
-                var leftBox = boxes[i];
-                var rightBox = boxes[j];
-
-                var distance = BoxDistance(leftBox, rightBox);
-
-                boxPairDistances.Add(new BoxPairDistance(leftBox, rightBox, distance));
-            }
-        }
-
-        // Sort in reverse order
-        boxPairDistances.Sort((left, right) => right.CompareTo(left));
-
-        return boxPairDistances;
-    }
-
-    private record Box(long X, long Y, long Z);
-
-    private record BoxPairDistance(Box Left, Box Right, double Distance) : IComparable<BoxPairDistance>
-    {
-        public int CompareTo(BoxPairDistance? other)
-        {
-            if (ReferenceEquals(this, other))
-            {
-                return 0;
-            }
-
-            if (other is null)
-            {
-                return 1;
-            }
-
-            return Distance.CompareTo(other.Distance);
+            return new Point(right.X * left, right.Y * left);
         }
     }
 }

Days/Day9.cs

@@ -0,0 +1,181 @@
+using System.Collections.Frozen;
+using System.Numerics;
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day9 : Day
+{
+    public override int Number => 9;
+    public override string Name => "Disk Fragmenter";
+
+    public override void RunPart1(bool display = true)
+    {
+        var (blocks, freeBlocksStarts) = ParseDiskBlocks();
+
+        var nextFreeIndex = freeBlocksStarts.Dequeue();
+
+        for (var i = blocks.Count - 1; i >= 0; i--)
+        {
+            // There is no more available space to move blocks into on the left
+            if (nextFreeIndex >= i)
+            {
+                break;
+            }
+
+            if (blocks[i] is -1)
+            {
+                continue;
+            }
+
+            blocks[nextFreeIndex] = blocks[i];
+            blocks[i] = -1;
+
+            nextFreeIndex++;
+
+            // Go to next free blocks if current free block is full
+            if (blocks[nextFreeIndex] is not -1)
+            {
+                nextFreeIndex = freeBlocksStarts.Dequeue();
+            }
+        }
+
+        var checksum = blocks
+            .Select((block, index) => block is -1 ? 0 : (long)block * index)
+            .Sum();
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Filesystem checksum: [yellow]{checksum}[/][/]");
+        }
+    }
+
+    public override void RunPart2(bool display = true)
+    {
+        var (blocks, freeBlocks) = ParseDiskBlocks2();
+
+        var mapStart = string.Join(" ", blocks);
+
+        for (var i = blocks.Count - 1; i >= 0; i--)
+        {
+            if (blocks[i] is -1)
+            {
+                continue;
+            }
+
+            // Get file length
+            var fileId = blocks[i];
+            var endPosition = i;
+            var startPosition = i;
+
+            while (startPosition > 0 && blocks[startPosition - 1] == fileId)
+            {
+                startPosition--;
+            }
+
+            var length = (endPosition - startPosition) + 1;
+
+            // Find first available free block on the left
+            var freeBlockIndex = freeBlocks.FindIndex(b => b.StartIndex < startPosition && b.Length >= length);
+
+            if (freeBlockIndex is not -1)
+            {
+                var freeBlock = freeBlocks[freeBlockIndex];
+
+                for (var offset = 0; offset < length; offset++)
+                {
+                    blocks[freeBlock.StartIndex + offset] = blocks[startPosition + offset];
+                    blocks[startPosition + offset] = -1;
+                }
+
+                // Update free block start and length
+                freeBlocks[freeBlockIndex] = (freeBlock.StartIndex + length, freeBlock.Length - length);
+            }
+
+            // Move to next file or free block
+            i = startPosition;
+        }
+
+        var mapEnd = string.Join(" ", blocks).Replace("-1", ".");
+
+        var checksum = blocks
+            .Select((block, index) => block is -1 ? 0 : (long)block * index)
+            .Sum();
+
+        if (display)
+        {
+            AnsiConsole.MarkupLine($"[green]Filesystem checksum: [yellow]{checksum}[/][/]");
+        }
+    }
+
+    private (List<int> Blocks, Queue<int> FreeBlocksStarts) ParseDiskBlocks()
+    {
+        var blocks = new List<int>(20_000 * 10);
+        var freeBlocksStarts = new Queue<int>();
+
+        var readingBlock = true;
+        var blockId = 0;
+
+        foreach (var length in Input.Select(encoded => encoded - '0'))
+        {
+            if (readingBlock)
+            {
+                for (var i = 0; i < length; i++)
+                {
+                    blocks.Add(blockId);
+                }
+
+                blockId++;
+            }
+            else if (length > 0)
+            {
+                freeBlocksStarts.Enqueue(blocks.Count);
+
+                for (var i = 0; i < length; i++)
+                {
+                    blocks.Add(-1);
+                }
+            }
+
+            readingBlock = !readingBlock;
+        }
+
+        return (blocks, freeBlocksStarts);
+    }
+
+    private (List<int> Blocks, List<(int StartIndex, int Length)> FreeBlocks) ParseDiskBlocks2()
+    {
+        var blocks = new List<int>(20_000 * 10);
+        var freeBlocksStarts = new List<(int StartIndex, int Length)>();
+
+        var readingBlock = true;
+        var blockId = 0;
+
+        foreach (var length in Input.Select(encoded => encoded - '0'))
+        {
+            if (readingBlock)
+            {
+                for (var i = 0; i < length; i++)
+                {
+                    blocks.Add(blockId);
+                }
+
+                blockId++;
+            }
+            else if (length > 0)
+            {
+                freeBlocksStarts.Add((blocks.Count, length));
+
+                for (var i = 0; i < length; i++)
+                {
+                    blocks.Add(-1);
+                }
+            }
+
+            readingBlock = !readingBlock;
+        }
+
+        return (blocks, freeBlocksStarts);
+    }
+
+}

Inputs/Day10.txt

@@ -0,0 +1,60 @@
+670107898789217654342123456782345678011256767898765465432101
+789234567654308210256034105891089019100349897767874376569101
+658341234530989300107845234521078323270110588758901287478272
+345450347621895418916976367652569454589223679643210896564383
+430569678934786917014989898743458765678334534554034787665898
+521678432825677806323876321212345107895450128765125693456721
+437876501910543215214985400303434234784966549834296502107610
+108978967865676784305673212345125105672877838126787411098523
+232169054654985895676894501876056216781236923035498321015432
+147054103023984104389087662943237645890321015676325677896761
+058943212110873201243179879850198732765430234588714986234890
+167687601101164012652234568766784321887342101899603215105659
+678996511231054873701221978955693870996456701234514504378778
+982123490543123964823400876554212987345980896785603673069867
+765010587650123455916512345443403456287671015498512982154956
+876523018567656996507845678932212310196542564321027854323241
+985452109898743887765930987821054321203433473452567761018130
+784343216789212701894321076543065010012128982867658956789021
+891238345323105611256232565332170321234089801998943441034330
+760189653410134320347183423469981236985178767870832332125545
+654308754589823412398094012578876547876589454561221089076556
+569210345676210503480189017665014566981074305432012670988987
+778123216784345676503276328984323475212565213456587521267981
+898014505891256985214965410810012984303456432347895430345670
+785210676540787694345898325723678778984234541056498741234321
+654321987034896001256763676554569560128105650110345657876434
+321039654126789123347854985438765430439876763431233054965235
+490318743256770104098923821129654321540569892343212123452196
+581401232149863265121012530034341013691456701456504567861087
+672310345038054396432343448101231012782347650987623438932387
+965498786521178987503453559874342103452878943298510129873498
+878945697810265089612354567565213478501987801123456018784567
+969034398924354108743543658106904569612016772010567105695436
+450123454589443298874632109237876548743125983400198234306721
+343210545476554581965549434312361039654334876510256543217810
+012654556321055670123678323403456128761242108981347789878934
+101763217898765432252101410589567545650543567432098236712125
+249890106789854501343234521673498432787694656548123145601016
+432187678768763312854145636762876501098781067439054006432567
+243014569659643210965098745891985411239872358928765419647898
+156103012346501349876787876740694320540965443210474328756787
+067612101236432358565678945056543217601453456754389845643896
+198787656345678967632365432127680108912322589863265434512387
+234594565676589874541050121218998012301011267770172123001989
+109683410789490163698210930300107321694120178089085012123476
+658762125610301252784327845451256430783243569172196781018565
+567891034521212341075456786965344567654652410234505492109410
+656900347234301056789845697874498698676701322343012343478326
+543211298165692345698926543289567789589887011452321034567567
+432104347076780434767810432101125654434996320961478933003498
+218765456987101229896321101911036763221745467870567122112567
+309894365896234310785410110876545894100876786987651033678985
+456789223345985401656789212567030345210965495698776544543234
+787650110276576564565094303498121236321234324308989434350198
+896343023183465433004185478767870387123456710217375621060167
+125432134092174332113276769365968791001249854567434789871256
+034334547894089211223498853478959601098345983098723348964343
+301227656323456200124567942562344512367896572129810254328321
+212018965214387103438901231001123201456087561234722167219450
+323127656103898234567872102121010126545123450165621098308761

Inputs/Day11.txt

@@ -0,0 +1 @@
+0 7 6618216 26481 885 42 202642 8791

Inputs/Day12.txt

@@ -0,0 +1,140 @@
+MMNNPPPPGGGGAGGPPPPPPPPPZZZZZZZLLLLLLLEEEEEEEEEEEEEEEAAAAAAAAAAAAAAAAAAAAMMMMNNMMMMMMMMMMMMMMMMAARRRRRRRRRRRRRRRRRRHHHHHHHHHHHHHAAAAAAAAAAAA
+MNNNPNPPGGGGGGGPPPPPPPEPZZZZZZZLLLLLLLWWEEEEEEEEEEEEEAPAAAAAAAAAAAAAAAAAAMMMMMMMMMMMMMMMMMMMAMMAARRRRRRRRRRRRRRRRQRHHHHHHQHHHHHHHWAAAAAAAAAA
+NNNNNNNPGGGGGGGGPPPPPPPZZZZZZZZZLLLLLLLEEEEEEEEEEEEEEPPPPAAAAAAAAAAAAAAMMMMMMMMMMMMMMMMMMMMMAAAAAAAAAVRRRRRRRRRQQQQHHQQHQQQHQHHHHWWWWAAAAAAA
+NNNNNNNNGGGGGGGPPPPPPPPPZZZZZZLLLLLLLLLLEEEMEEEEEEEEEEPPPPAAAAAAAAAAAMMMMMMMMMMMMMMMMMMMMMMMMAAAAAAVVVVRRRRRRRQQQQXQQQQQQQQQQQQHHHWWWWWAAAAA
+NNNNNNNYYGGGGGGPPPPPPPPPZZZZZZZLLLLLLLLMMMMMEEEEEEEEEPPPPPPAAAAAHAAAAMMMMMMMMMMMMMMMMMMMMMMMMMMAVVVVVVVRRRRRQQQQQQQQQQQQQQQQQQQHHWWWWAAAAAAA
+NNNNNNNXYYYCCCIPPPWZPPPPPZZZZZZLLLLLLLSSMMSSEEEEEEEPPPPPPPPPPAAHHAAAAHMMMMMMMMMMWWMMMMMMMMMMMMMMMDDVVVVRRRRRRQQQQQQQQQQQQQQQQQQHHWWWWWAWAAAA
+NNNNNNXXYCCCCCIPPPPZZPPPZZZZZZZZLSLSSSSMMMSSEEEEEEEPPPPPPPPPPPAAHHAAAHHMMMMMMMMMMWMTTMMMMMMMMMMDDDDVVVVRRIIMRMMMQQQHTTQQQQQQQQQQQWWWWWWWWWWA
+NNNXXXXXXCCCCCCXPZPZZZPZZZZZZZZZZSSSSSSSSSSSEEEEEEEEPPPPPUUXXXHAHHHAHHHMMTMMMTMMMMTTTMMMMMMMMMDDDDDVIIIRIIMMMIMZQQQHTHQQQQQQQQQQAAWWWWWWWWAA
+NNNNXXXXCCCCCCCZZZZZZZZZZZZZZZSSSSSSSSSSSSSSSSEEFFPPPPPUUUXXXHHHHHHHHHHHTTMMMTMMMMTTTTTMMMMMMDDDIDDVIIIIIIIMMMMMQQQHHHQQQQQQQQQQAAAWWWWWAWAA
+NNNNNXXXXCCCCCAVVZZZZZZZZZZZUUUSSSSSSSSSSSSSSFEFFFFPPPPUUUXXXXHHHHHHHHHHHTMTTTTTMMTTTTTTMMMDMDDIIIVVIIIIIIIMMMMMMQQHHQQQQQQQQGGGQAAAWWWAAAAA
+NNNNNXXXCCCCCVVVVVVZZZZZZZZUUUUSSSSSSSSSSSSSFFFFFFFPPPUUUUXUXHHHHHHHHHHHHTTTTTTTMMTTTTTTMMDDDDDDIIIIIIIIIIIMMMMMMQIHAQQQQQQQQQQQQAAAAAWAAAAA
+NNNNNNXCCCCCCCVVVVZZZZZZZZZUUUUSSSSSSSSSSSSSSFFFFFFPPPUUUUUUXHHHHHHHHHHHHHTTTTTTTTTTTTTTTTTDDDAAAAIAIIIIMMMMWMMDDGGGAQQQQQQQQQQQQQAAAAAAAAAA
+NNNNNNNCCCCCCCCVVZZZZZZZUZZUUUUSSSSSSSSSSSFFFFFFFFFFPPUUUUUUUHHHHHHHHHHTTTTTTTTTTTTTTTTTTTDDVVAAAAAAIIIIIIIMMTTDDGGGAQQQQQQQQQQWWWUUUAUUUAAA
+NNNNNNNNCCCCCCCCVVZZZZZZUUZUUUUSSSSSSSSSSSSSFFFFFFFFPPUUUUUUHHHHHHHHHHHHHHTTTTTTTTTTTTTTTTTDVVXAAAAAIIIIIIIMTTTTTTTGGQQQQQQQQQQWWWUUUUUAAAAA
+NNNNNNNNNNNCCCCCCCZZZZZZUQUUUUUUUSSSSSSSSXSSOFFFFFFFFPPPPUOOHHHHHHHHHHHTTTTTTTTTTTTTTTTTTTTDVVVAAAAAAIIIIIIMTTGTTGGGGQQQQQQQQQQWWWUUUUUUAAAA
+NNNNNNNNNNCCCCCCCCZZZZZUUQUUUUUUUSSSSSSSSSSOOOOFPFPFPPPPPPPPPPHHHHLHHHHTTTTTMMMTTTTTTTUTTTTDDVVVVAAAAIIIIIIMTTTTTGGGGQGGGQQCQQWWWWUUUUUUUUUA
+NNNNNNNNNNNNCCCCCBBMZZZUUUUUUUUUUSSSSSSSSOOOOBBPPPPFPPPPPPPPPPXHHHHHHHHTTPTTMMMTTTTUTUUUUUUUVVVVVVVAAAIIIIIITTTTTGGGGGGGGQFFWWWWWWUUUUUUUUUU
+NNNNNNNNTNCCCCCCBUBBHCCCUUKUUUUUSSSSSSSSOOOOOBBPPPPPPBPPPPPPPPHHHSSSSHPPPPPMMMMMTTTUUUUUUUUOUVVVVVVAAIIIIIIITTTTGGGGGGGGGFFFWWWWUUUUUUUUUUUU
+NNNNNNNWCCCCCCCBBBBBBCCCCCUUUUUUSSSSSRRRROROOOBBBBBBBBBBPPBBBBHSSSSSSSPPPPPMMMMMTTUUUUUUUUUUUVVVVVVVVVVVVXIITTTGGGGGGGFFFFFFSSKWUUUUUUUUUUUU
+NNNNNWWWWCCCCCCCBBBBHCCCCCUUUUUUUSSTGRRRRRRRRBBBVBBBBPPPPPBBBBSSSSSSSSPPPPPPMMMMMTTUUUUUUUUUUVVVVVVVVVVVVXXUUGGGGGGGGGFFFFFNSSKKJUUUUUUUUUUU
+MMMWWDWWIWWCCCCBBBBBBCCCCCCCCCCCCCGGGGRRRRRRRVVVVBBXXXXXPPBBSSSSSSSSSPPPPPPPMMMMMUTUUUUUUUUUUUUVVVVVXXXXXXXUUGGGGGGGGGFFFFFSSKKKJUUUUUUUUUUU
+MMMMWWWWWWWCCCCBQBBBBCCCCCCCCGGCGGGQGGRRRRRRRVZZZZZXXXXXBBBSSSSSSSPSPPPPPPPPPMMMMUUUUUUUUUUUUUUFVVVVXXXXXXXUUUUGGXGGGGGFFFFAAAKKJUUUUUUUUUUU
+MWWWWWWWWWCCCCCCQBQBCCCCCCCCCCGCGGGGGGRRRRRVVVVVZZZXXXXXZBBSSSSSSSPPPPPPPPPPPMMMMMUUUUUUUUULFFUFFVXXXXXXXXXUUUUGXXGGGEFFFKKKKAKKKKKUUUUUUUUU
+WWWYWWWWWWKCCCQCQQQCCCCCCCCCCGGGGGGGGGGGGGGVVVVVVZZXXXXXZZBBSBBSSSPPPPPPPPPEEMMMMMGUUUUUUUULFFFFVVXXXXXXXXXUUUUUBBUUGEFFFKKKKKKKKKUUUUUUUUUU
+WWWWWWWWWWWQQQQQQQQCCCCCCCCCCGGGGGGGGGGGGGGVVVVVVVZXXXXXKKKBBBBSSSSUUPPPPPPEMMSMMGGVAAAUUQFFFFFFVVVVVXXXXXUUUUBBBUUREEEMMKKKKKKKKKKKUUUUUUUU
+RWWWWWWWWWWQQQCQQQCCCCCCCGGGGGGGGGGGGGGGGGVVVVVVVVVXXXXXKKKKKBBBBBSSUPPPPPSMMMSSMMGVVVVVVQFFFFFFFFVVVXXXXXUUBUBBBBBREEEMMMMKKKKKKKKKUHUUUUUU
+WWWWWWWWWWWQCCCQQQQCCCCCCCCCGGGGGGGGGGGGGGGVVVVRVVRXXXXXKKKKBBBBBBBBPPPPPPSSSSSSMMMVVVVVVVFFFFFFFFFFFXXHXUUBBBBBBBRRREMMMMMKKKKKKKKKKHHHUUUU
+WWWWWWWWWWWCCCCQQQCCCCCCCCCIGIIGGGGGGWGGGGVRRRRRRRRXXXXXKKKKKKKBPBBPPPPPPSSSSSSSSMVVVVVVVVVVFFFFFFFFFHHHUUBBBBBBBRRRMMSMMMKKKKKKKKKKKUHUUUUU
+WWWWWWWWWWWWCCCCCCCCCCCCCCIIIIGGGGGGGWGGGVVRRRRRRRXXXXXXKKKKKBBBPPBPPRPPPPPSSSSSSVVVVVVVVVVVAFFFFFFFFFHHHHIBBBBBRRRRMMMMMMSKKKKKKKKVVUUUUUUU
+WWBBWWAWWUUUCCCCCCIQQCCCCIIIIRRRRRRRWWWGGVRRXXXXXXXXXXXXKKKKBBBBPPPPPPPPPPPPSSSVVVVVVVVVVVVVAFFFFFFFFFHHHBBBBBHHHRRRMMMMMMMKKKKKKKKVUUUUUUUU
+WWWAAAAWUUCCCCCCCIIICCCCCIIIIRRRRRRRWWGGVVVVXXXXXXXXXXXOBKBBBBBPPPPPPPPPPPPPPPPPLVVVVVVYVVVEFFFFFFHHHFFHHHHHBBBBHHHMMMMMMMMMKKKKKUUUUUUUUUUU
+WWWAAAAUUUUCCCCCCIIIIIIIIIIIURRRRRRRRRGGXXXXXXXXXXXXXXXRBBBBBBBBPQPPPPPPPPPUPPXEEVEVVVVVVVEFFFFFFFHHFFHHHHHHHHBHHMMMMMMMMMMMKKKKKKKKUUUUUUUU
+WWWAAAAUAUUCCCCCCLLIIIIIIIIUURRRRRRRRRGGXXXXXXXXXXXXXXXRRBBBBBBBPPPPPPPPPPPUPVEEEEEVVVVEVEEEEEFFFFHHHHHHHHHHHHHHHHMMMMMMMMMKKKKKKKKUUUUUUUUU
+WWAAAAAAAAUEEEOOOLIIIHIIIIIIURRRRRRRRRXXXXXXXXXXXRXXXXXXRBBBBBBBBPPPPBPPPBEBBBEEEEEVVVEEEEEEEEEEFHHHQHHHHHHHHHHHHHMMMMMMMMMMMKKKKKUUUUUUUUUU
+OOAAAAAAAAUOOOOOOLLLLIIIIIIIURRRRRRRRRXXLLLLXXXXXRXXXXXXRRMBBBBPBPPPPBBTPBBBBEEEEEEEEVEEEEEEEEEEFQQQQHHHHHHHHHMMMMMMMMMMMMMMMMMKKKKUUUUUUUUU
+OACCAAAAAGAOOOOOOELLLLIYIIRRRRRRRRRRRRXLLLLLXXXXXRRRRXXXRRRBBBBJKKPPPBBBBBBBBBEEEEEEEVEEEEEEEEEEEQQQQQHHHHHHHHHMMMMMMMMMMMMMMMMKKKUUUUUUUUUU
+AAAAAAAAAAAOOOOOEEELLLIYYVRRRRRRUUUUXXXLLLLLXXXXXRRRRXXXRMRBBBBJKJUBBBBBBBBBBBCEEEECEEEEEEEEEEEEQQQQQQHHHHHHHHHMMMMMMMMMMMMMMMWDDDWUUUUUUUUU
+AAAAAAAAAAAOOOOOUULLLYYYRRRRRRRRUUUUXXXXLLLLXXXXXXXXXXXXXMMCCBLJJJUBBBBBBBBBBQCCCCCCEEEEEEEEEEEEEFQQQHHHHHHHHMMMMMMMMMMMMMMMMWWWWWWWUUUUUUUU
+AAAAAAAAAAROOOOORRRRRRRRRRRYYDUUUUXXXXXXXLLLXXXXXXXXXXXXXCCCCCJJJJUUUUUBBBBCCCCCCCCCCEEEEEEEEEEEEEQQQEEHHHHHHHMMMMMMMMMDDDDDMWWWWWWUUUUUUUUU
+ZZAAAAAXAAROOOOORRRRRRRRRRRDDDUOUUAAXXXXWWLLLLRRXXXXXXXXXCCCCJJJJJJJJJJBBBLLLLLCCCCCEEEEEEEEEEEEEEEEEEEHEEEHHHMMMMMMMDDDDDDWWWWWWWWWWUWUUUUU
+ZZZAAAAOOOOOOOOORRRRRRRRRRRYDUUOUUUAXXXXXAAAALRRXXXXXXXXXCCCCCCCJJJJJLLLLLLLLLCCCCCCEEEEEEEESEEEEEEEEEEEEEHHHMMHMMMMDDDDDDDWWWWWWWWWWWWWWUUU
+ZZZAAAUOOOOOOOOORRRRQYYYYYYYYOUOUUAAAAAAAAAAALRRXXXXXXXXXCCCCCCJJJJJJLLLLLLLLLCCCCCCCCEEWWEEEEEEEEEEEEEEEEEHHHHHMHHHQQQQQQQQWQWWWWWWWWWWWWUU
+ZZAAXAUOOOOOOOOORRRREYYYYYOOOOOOOOAAAAAAAAAAAARAAAAAZXXXCCCCCCCJJJJJJJLLLLLLLLCCCCCCCCEEWWWEEEEIEEEEEEQQHHHHHHHHHHHQQQQQQQQQQQWWWWWWWWWWWWUU
+ZZAAXAUOOOOOOOOORRRROOYYREOOOOIOOOAAAAAAAAAAAARAAAAAZZZYYCCCCCCJCJJJJLLLLLLLLLCCCCCCCCCWWWEEEEIIEEEEEEEQQHHQHHHHHHQQQQQQQQQQQQWWWWWWWWWWWWUU
+ZZAAUUUOOOOOOOUUEEEEEEEEREOOOOIOOOAAAAAAAAAAAAAAAAAAZZZYYYYCCCCCCCCLLLLLLLLLLLLLCCCCPCWWWWEEEEIIIIEEEEEQQQQQHHAQQQQQQQQQQQQQQQWWWWWWWWWWWUUU
+PPPPPYUOOOOOOOEEEEEEEZEEEEOOOIIIIOAAAAAAAAAAAAAAAAAYYYYYYYYCCCCCCCCLLLLLLLLLLLLLCCCPPCWWWWWEEEIIIIEEEEQQQQQQQJJJJQQQQQQQQQQQQQQQQWWWWWWWUUUU
+PPPZYYYOOOOOOOOOOOEEEEEEEEIIIIIIIIAAAAAAQQAQAAAAAYAYYYYYYYYCCCCCCCLLLLLLLLJJLFLFFCTFFWWWWBBEEIIIIIKQQEQQQQQQJJJJJQQQQQQQQQQQQQQQQQWWWWWWUUUU
+PPPZYYYYYYYYYOOOOOEEEEEEEIIJIIIIIIACAAQQQQQQQAAYYYYYYYUYYYYCCCCCCCCLLLLLLLFFJFMFCCFFFSBBBBBBIIIIIIIQQQQQQQQQQQJJJJQQQQQQQQQQQQQQQQQWWKWWWUUU
+PPPYYCYYYYYYYOOOOOOEEEEEEIIIIIICCCCCCCCCCQQQQQYYYYYYYYYYYYYCYCCCCCCCLOOOLLFFFFFFFCFFFSSBBBBBIIBIIIBBQQQQQQQQQQQJJJQQQQQQQQQQQQQQQQQWLWWWWUUU
+PPYYYYYYYYYYYOOOOOOEEEEEEEIIIIICCCCCCCCCCQQQQQQQQYYYYYYYYYYYYCCCCCCOOOOOLHHFFFFFFFFFFFSSBBBBBBBIBBBQQQQQQQQQQQQQJJJQNQQQQQQQQQQQQQHHHHWWWWUU
+PYYYYYYYYYYYYOOOOOOEEEEEEEIICCCCCCCCCCCCCQQQQQQQQYYYYYYYYYYCCCICKITOOOOOHHHFFFFFFFFFFFFFBBBBBBBBBQQQQQQQQQQQQQJQJJJOQQQQOQQQQQQQQQQHHHHWWWHH
+PYYYYYYYYYYYYOOOOOOEEEEEIIIICCCCCCCCCCCCCQQQQQQQQYYYYYYYYZYSCCIIKIIOOOOOHHFFFFFFFFFFFFFFFFBBBBBBBBQQQQQQQQQQQQJJJJOOOQQQOQQQQQQQQQHHHHHHWWHH
+PYYYYYYYYYYYYOOOOOOEEIIIIIIICCCCCCCCCCCCCQQQQQQYYYYYYYYYYYYIIIIIIIIOOOOOHHFFFFFFFFFFFFFFFBBBBBBBBBQCQQQQQQQQXXXJJKKOOQQQQQQQQQQQQQHHHHHHHHHH
+PPPPYYYYYYYYYOOOOOOIEIIIIZZZCCCCCCCCCCCCCQQQQQQQPYYYYYYYYBYBIIIIIIIOOOOOIHHFFFFFFFFFFFFFFBBBBBBBBBBQQQQQQQQQXXXKKKKKKKKKKKQQQQQHHHHHHHHHHHHH
+PPPYYYYYYYYYYOOOOOOIIIIIIZZZCCCCCCCCCCCCCQQQQQQPPPYYYYYYYBBBIIIIIIIOOOJJIIFFFFFFFFFFFRFFFBBBBBBBBBBBQQQQQQQQXXXKKKKKKKKKKKQQQQQHHHHHHHHHHHHH
+PPPPPYYYYYYYYOOOOOOIIIIIIZZZCCCCCCCCCCCCCMQQQQQQQYYYYYYYYYYBBIIIIIIOOOOOOFFFFFFFFFFRRRFBBBBBBBBBBBBBBBQQQQQQQXKKKKKKKKKKKKQQQKQKHHHHHHHHHHHH
+PPPPPYYYYYYYYIIIIIIIIIIIIIZZCCCCCCCCCCCCCCCCCCCCCGGYYYYYBBBBIIIIEEIIOOOOODFFFFFFVBBRRRRBBBBBBBBBBBBBWBQQQQQQQQIIIKKKIKKKKKKKKKKKDDDDDDHHHHHH
+PPPPYYYYYYYYYIIIICIIIIIIIIIZCCCCCCCCCCCCCCCCCCCCCGGYYBBBBBBIIIEEEEEEOOOOOFFFFFFBBBBBRRBBBBBBBBBBBBBBWWWWQQQQPQIIIIIIIKKKKKKKKKKKKKDDDDHHHHHH
+PPPYYYYYYYYYYICIICCIIIIIIIZCCCCCCCCZZZCCCCCCCCCCCYYYYBBBBBBBIIEEEEEEOOOOOEEFFFFCBBBBRRBBBBBBBBBWWWWWWWWWQWWIIIIIIIIIPIKKKKKKKKKKKKDDDDDHHHHH
+PPPPYYYYYYYZYZCCCCIIIIIIIIZZCCCCCCCZZZCCCCCCCAQQAGLYBBBBBBBBBBEEEEEEOOOOOEEEFFWBBBBBBBBBBBBBBBBBWWWWWWWWWWIIIIIIIIIIIIIKKKKKKKKKKDDDDDDDDHHH
+PPPPYYJJYZZZZZCCCCIIIIIIIIIFZZZZZZZZZZCCCCCCCAAAAGGGGGGBBBBBBBEEEEEEOOOOOEEEEFWWBBBBBKKBKKBBBBBWWWWWWWWWWWWIIIIIIIIIIIKKKKKKKKKKKDDDDDDHHHHH
+PPZPPYJJYZZZZZZCCCCIIIIIFIIFFBFFZZZZAACCCCCCCAGAGGGGGGGGGBBBBEEEEEEEOOOOOEEEEWWHZZZBBWKKKKKBBWWWWWWWWWWAWWWWIIIIIFIIIIKKKKKKKPKKKDDDDNDHHHHH
+ZPPPPPZZZZZZZZZCCCCCCUIIFIIFFFFOOZZZAAACCCCCAAGGGGGGGGGGBBBBBEEEEEEEOOOOOEEEXHHHZWWWWWKWWKKWWWWWWWWWWWAAAWWWIIIIIFFIKKKFFFKPKPKKKKDDDDHHHHHH
+ZZZPZZZZZZZZZZZCIIRCUUUIFFFFFFFOFBZAAAACCCCCAAGGGGGGGGGGGGBEEEBEEEEEDEDDEEEEXHHHHHHWWWWWKKKKWWWWWWWWWWAAARRWIIIIFFFIFKFFFFPPPPKKKKKPHHHHHHHH
+ZZZZZZZZZZZZZZZIIIIIUUUFFFFFFFFFFZZZNANCCCCCAGGGGGGGGGGGGGBBBBBEEDDDDDDDDEEEEEHHHHHWWWWWWKWWWGWWWWWWWWAAARRRIIIIFFFFFFFFFFFPPPKPKKKPPPHHHHHH
+ZZZZZFZZZZZSSZZRIIIIUUUFFFFFFFFFFFFFNNNCCCCCGGGGGGGGGGGGGBBBBBBBDDDDDDDDDDEEEEHHHHWWWWWWWWWWWWWWWWWWAAAAARRRIIIIIFFGFFFFFFFFPPPPKPPPPPPHHHHH
+FFFFFFZZZZZZSSSIIIIIUUUUUUUFFFFFFFWNNNNNNANGGGGGGGGGGGGGBBBBBBBBDDDDDDDDDDDDEHHHHHWWWWWWWWWWWWWWWWWWAAARRRRRIRIIFFFFFFFFFFFWPPPPPPPPPPPHHHHH
+GFFFFFLZZZXZSSSSSSSIUUUUUUUFFFFFFFFFNNNNNNNNNGGGGGGGGGBBBBBBBDBDDDDDDDDDDDDDHHHHHHWWWWWWWWWWWWJJJWAAAARRRRRRRRRIFFFFFFFFFFFWWPPPPPPPPPPPHHHH
+GFFFFFFFFZFQFSSSSSSUUUUUUUUUFFFFFLFYNNNNNNNNGGGGGGGGGGBBBBBBBDBDDDDDDDDDDDDDHHHHHHHWWWWWWWWWWWWWJAAAARRRRRRRRRRQFFFFFFFFFFFFWPPWWPPPPPPPHHHH
+GGFFFFFFFFFFFSSSSSSUUUUUUUUUUFFFZNNNNNNNNNNNUUUGGGGGHIIBBBBBDDDDDDDDDDDDDDDDHHHHHHHWWWWWWWWWWWWUAAAAAAIRRRRRRRQQFFQRFFFFFFFFWWWWWPPPPPPUIISS
+FFFFFFFFFFFFIFSSIIIIUUUUUUUUFFFFINNNNNNNNNNNNNUGGGGIIIIIIIIIDDDDDDDDDDDDDDDHHHHHHHHWWWWWWWWWWWWWCACCCQQQRRRQQQQQQFFRCFFRRFFWWWWWWPPPPPPUUIIS
+QQQFFFFFFFFFIFIIIIIIUIUUUUUUUIIIIIINNNNNNNNBNNUUGGGIIIIIIIIIDDDDDDDDDDDDDOEHEHHHHHHWWWWWWWWWWSWCCAACQQQQQQQQQQQQQQQRRRRRRRRWWWWWWPPPPPPPPIIS
+QQQQFQFFFFFFFFPIIIIIIIUUUUIIIIIIIIINNNNNNNNNNUUUUUIIIIIIIIIIAADDLDDDDDDDDOEEEHHHHHWWWWWWWWWWHHCCCCCCQQQQQQQQQQTTQQRRRRRRRRRWWWWPPPPPPPPPIIIS
+KQQQQQFFFFFFFFFIIIIIIIUUUUIIIIIIIIINNNNNNNNNNUUUUUUIIIIIIIIIADDDLDDDDXXEEEEEEHHHHHHHWWRQQQHHHHCCCCCQQQQQQQQQQTTTTTRRRRRRRRRRPPPPWPPPPPPIIIII
+KKKQSSSSFFFFFFFIIIIIIIUIIIIIIIIVIIIVVVNNNNNNNNUNUUUIIIIIIIIDDDDDLDXDDXXEEEEEEEHHHHHHWRRQQQHHHHCCCCCQQQQQQQQQQTTTTRRRRRRRRRSSSPPPPPPPPIIIIIII
+SKVSSKSSALLLNLLRIIIIIIIIIIIIIIIVVVVVNNNNNNNNNNNNUUUIIIIIWWDDDDDDDDXXXXXEEEEEEEEHHHHHHRRQQQHHHHHHHCCCQQQQQQQQQTTTTRYRRRRRRRSSSSSSPPPPPIIIIIII
+SSSSSSSSLLLLLLLRIIIIIIIIIIIIIIIVVVVVVVNVNNNNNNNUUUUIIIIIDDDDDDDDDDDXDXXEEEEEEEESAHHHHRRQQQQQHHHHHHHHHHHQQQQQQTTTTYYYRRRRRRSSSLLLPPPIIIIIIIIW
+SSSSSSSSLLLLLLLLIIIIIIIIIIIIIVVVVVVVVVVVNNNNNNNNNUUIIILDDDDDDDDDDDDDDDDEEEEEESSSSQQIFFFFFFFFUHZHHHHHNNHQQTQTTTTTTYYYYRRVLLLLLLLLBIIIIIIIIIIW
+WWWSSSSSLLLLLLLLINNIIIIIIIIIVYVVVVVVVVVVNNNNNNNNUUUUUUUBBDVDDGDDDDDEEEDEEEEESSSSSQQQFFFFFFFFQZZZZHHHHNNNTTTTTTTTYYYYYRRLLLLLLLLLBBIIIIIIIIIW
+WWSSSSSSSSLLLLLNISNIIIIIIIIIVVVVVVVVVVVVVNNANNNNNUUUUUULLMLDDGGDDDDEEEEEESSSSSSSQQQQFFFFFFFFQQZZHHHNNNNTTTTTTTTHHYSYYYYLLLLLLLLLBIIIIIIIIIII
+WWWSSSSSSSSSSSNNNNNNIIIIIVVVVVVVVVVVVVVVAAAANNNNNUUUUUUULLLDDDLLDDDDEEEEESSSSSSSSSQQFFFFFFFFFFFZZZHNNNNTTTTTTTTHYYYYYYYLLLLLLLLLBIIIIIIIIIIX
+WWWSSSSSSSSSSSNNNNNIIIIIIVVVVVVVVVVVVVVVAAANNNNTTTUUUUULLLLLLLLNDDDDMEESSSSSSSSSSQQQFFFFFFFFFFFZJJJJNNNNNTTTTFFFFYYYYYYLLLLLLLLLLLBIXIIIIIXX
+WZWZSSSSSSSSSSNNNNNNIIIIIVIVVVVVVVVVVVVVAAAAANNTUUUULLLLLLLLLLLLQDLDEEESSSSSSSSSSQQQFFFFFFFFFFFJJJJNNNFFNTTTTFFFFKKYYYYRLLLLLLLLTTTIIHHIIMMX
+ZZZZSSSSSSSSNNNNNNNNIIIIIIIIVVVVVVVVVVVVAAAAETTTQUUUULLLLLLLLLLLLWLLEEESSSSSSSSSSQQQFFFFFFFFFFFJJJJJJJFFFFFFFFFFKKKYYYRRRLLLLLTTTTTHHHHIMMMM
+ZZZZSSSSSCCCNNNNNNNNNIIIIIIIVIVVVVVVVVAAAAAEETTTQQUUULLLLLLLLLLLLLLLEESSSSSSSSSSSQSQFFFFFFFFFFFFFFFJJWFFFFFFFFFFKKKKYRRRRRLLLLTSTTTTHHHHMMMM
+ZZZZSSSCCCCCYNNNNNNNNIIIIIIIIIVVVVVVAAAAAEEEETTQQQUUULLLLLLLLLLLLLLLEEQSSSSSSSSSSSSQFFFFFFFFFFFFFFFJJFFFFFFFFFFKKKKKKRRRRRLLLLTTTUTTTHMMMMMM
+ZZKKCCCCCCCCCCNNNNNNIIIIIIIIIIIIRVVVVAAAAAEEEEEEEQUQLLQLLLLSSSSLLQQLQQQSSSSSSSSSSSSCFFFFFFFFFFFFFFFTJTFFFFFFFFPFKKKKKKRRRLLLLLLLTUTTTHHMMMMM
+KKKKCCCCCCCCCCNNNNNNIIIIIIIIIIIIIIAAAAAEEEEEEEEEEQQQQQQLLLLLESSSSQQLQQQSSSSSSSSSSSSSFFFFFFFFFFFFFFFTTTTFFFFFFFFFFKKKRRRRRRLLLLLLTTTTTTHHMMMM
+UKKKCCCCCCCCCNNRYYIIIIIIIIIIIIIIIIAAAAAEOEEEEEEEEEQQQLLLLLLLESSSQQQQQQQQSSSVSSSSSSSJFFFFFFFFFFFFFFFTTFFFFFFFFFFFKKKKKRRRRRLLLLLLLLTTTTHHMMMM
+UKKCCCCCCCCCCCNCYYIIIIIIIIIIIIIIIIAABAAAEEEEEEEEEQQQQQLLLLLLEEQQQQQQQQQQSSVVSSSSSSSSFFFFFFFFFFFFNNNNTNNFFFFFFZKKKKKKKRRRRLLLLLLLLLTTTTHHMMMM
+UKKCCCCCCCCCCCCCYYIIIIYYYYYIIIIIAAABBBBEEEEEEEEEQQQQSSLLLESSEQKQQQQQQQQQSVVVVSSSSPPSFFFFFFFFFFFFNNNNANNNFFFFFFKKKKKKKIIRILBULLLLLLTTMMMMMMMM
+UKKKCCCCCCCCCCYYYYYIIIYHYYYYYYIAAAABBBBBEEEEEEQQQQQQSSSSSSSSEQQQQQQQQQQQQQVVQPPPPPSSSYFFFFFFFFFFNNNNNNNNNNFFFFKKKKKKKIIIIIUUUULUTTTTTTMMMMMM
+UUKKKCCCCCCCCYYYYYYIYIIHHHYAAAIAAAABBBBBBEEEEEEESSSSSSSSLLSSQQQQQQQQQQQQQQQQQPPPPPSYYYYJFFFFFFFFNNNNNNNGNMMMFFKKKKKKIIIIIIUUUUUUUTTTTMMMMMMM
+UKKCCCCPCCCSSYYYYYYYYYYHHFAACAAAAAAABBBBBEEEDDSSSSSSSSSSLSSSHVQQQQQQQQQQQQQQQQQPPPYYYYEEEEEJJJJNENENNNNNNMMMMFKKKKKKIIIIUUUUUUUUUTUTMMMMGMMM
+UKKKKKCCCCCYYYYYYYYYYYYHHHAAAAAAABBBBBBBBEEBSSSSSSSSSSSSSSSHHVQQQQQQQQQQQQQQQQQPPPYYYYYEEEEEEEEEENENNNNNNMMMMMKKKKKKIEEIIUUUUUUUUUUUDMMMGMMZ
+UKKKKKKKCCCAAAYYYYYYYYYHHHTAAAAAAAABBBBBBBBBBBBSSSSSSSSSSSSVVVQQQQQQQQQQQQQQQXXPPYYYYYYHEEEEEMEEEEEENNNNNMMMMKKKKKIIIEEEEUUUUUUUUUUUMMMMMMMZ
+KKKKKKKKTTCCCYYYYYYYYYHHHAAAAAAAAAJJBBBBBBBBBBBBSSSSSSSSSSSSVVQQQQQQQQQQQMQDQXXPYYYYYYEEEEEEEEEEEEEENNNNMMMMMMMMKKEIEEEEEEEPUUUUUMMMMMMMMZZZ
+KKKKKKKTTTMMKBYYYYYYYYHHHHHAAAAAAAJJBBBBBBBBBBSSSSSSSSSSSSSVVVVVQQQWQQQQMMXDQXXPYYYYYYYYEEEEEEEEEEEENNMMMMMMMMMKKKEEEEEEEEEEUUZUIMMMMMMMMZZZ
+KKKKKKTTTTTMKKYYYYHHHHHHHHHUAAAAAAJJBBBBBWWBBSSSSSSSSSSSSSVVVVVVQTQWQMMMMMXXQXXXXYYYYYEEEEEEEEEEEEEENNNNMMMMMMMKRKEEEEEEEEEEUZZZMMMMZMMMZZZZ
+KKTTTTTTTTTTKKYYKKKKKHBHHHHZLAAAAAAJJBBBNWWWRWWSSSSSSSSVVVVVVVVVVVVVQMMMMXXXXXXXPXXYYYYYEEEEEEEEEEENNNNNMWMMMMSSRRREEEEEEEEZZZZZZMMMZMMMMZZZ
+KKTTTTTTTTTTKKKKKTKKKHBHHNZZLLLAAAJJJJBJWWIWWWWWSSSSSSSVVVVVVVVVVVVMMMMMMXXXXXXXXXXXYYYYEEEEEEEEEEEEEWWWMWWMMMSSRSSSEEEEEEEEZZZZZZMZZZMZZZZZ
+TTTTTTTTTTTTJTTTTTTKKKKHHHZZZZLAAAAAAJJJJWWWWMMMMSSSSSVVVVVVVVVVVVVMMMMXXXXXXXXXXXXXYYYYYYEEEEEEEOWWNWWWWWWWWMSSSSSQESEEEEEEZZZZZZZZZZZZZZII
+TTTTTTTTTTTTTTTTTTTKKKKKHHZZZAAAAAAJJJJJWWWWWMMMMSSSSSSVVVVVVVVVVVVVMMMMXXXXXXXXXXXXYYYYYIIIIEIHEOWWWWWWWWWMMMSSSSSSSSSEEEEEYYZZZZZZZZZZZIII
+TTTTTTTTTTTTLTTTTTTKKKKKKKKKAAAAAAAAAJJJJJWWWMMMMSSSSSSSVVVVVVVVVVVVVMMXXXXXXXXXXXXXXYYYIIIIIIIWWWWWWWWWWWWMMMSSSSSSSSSEEEDEYYYYZZZIIIIIZIII
+TTTTTTTTTTTTTTTTTTTKKKKKKKKAAAAAAAAAJJJJWWWWWMMMMSSSVSSVVVVVVVNVVNNNVMMXXXXXXXXXCXYXXYYIIIIIIIIIWWWWWWWWWWWWMMMSSSSSSSSEEYDYYZZZZZIIIIIIIIII
+TTTTTTTTTTTTTTTTTTTTTKKKKKKAAAAAAAAAWWWWWWWWWMMMMCVVVVVVVVVVVNNNNNNNXNNXXXXXXXXXYYYYYYYIIIIIIIIIGWWWWWWWWWWWMMSSSSSSSSSYYYYYYKKZZIIIIIIIIIII
+TTTTTTTTTTTTTTTTTTTTTKKKKKKKKAAAAAAAWWWWWWWWWMMMMCVVVTVVVVVVVNNNNNNNNNNKKXXXXXXXYYYYYYIIIIIIIIIIWWWWWWWWWWWWSSSSSSSSSSSZZYYYYYYZJIIIIIIIIIII
+TTTTTTTTJTTTTTTTTTTTTTYKKKKKKAAAAAAAWWWWWWWWWMMMMWVVVTVVVNVVNNNNNNNNNNNNKXXXXXYYYYYYYYYYIIIIIIIIWWWWWWWWWWWWSSBSSSSSSZSZZZYZYYZZIIIIIIIIIIII
+ZTZTTTTTTTTYYTTTTTTTAAYKKKKKKAAAAAAWWWWWWWWWWMMMMMMMMMMMMMVVNNNNNNNNNNKKKXXXKKYYYYYYYYYIIIIIIIIIIIWWWWWWWWWWSASSSSQSZZZZZZYZYZZZZIIIIIIIIIII
+ZTZTTTAYYYYYYTTTTTTTTYYYYTTAAAAAAAAWWWWWWWWWWMMMMMMMMMMMMMNNNNNNNNNNNNNKKKKKKKKYYYYYYYYKIIIIIIIIIIWWWWWWWWNWAASSSSSSZZZZZZYZZZZZZIIIIDIIIIII
+ZZZZTHAAAYYAYYTTTTTTTTYYYYYUUAAAAAAUWWWWWWWWWMMMMMMMMMMMMMNNNNNNNNNNNNNKKKKKKKKYYYYYYYKKKIIIIIIIIIWWWWWGNNNNNNSQSSZZZZZZZZZZZZZZZZIIDDIIIIII
+ZZZZZZAAAAYAYYYYTTTTTTYYUUUUUUAUUUUUWWWWWWWWWMMMMMMMMMMMMMNNCNNNNNNNNKKKKKIIIKIIIYYYYYYYKIIIIIIIIWWWWWWWNNNNNNPPSSPPZZZZZZZZZZZZZZZDDDIIIIII
+ZZZZZAAAAAAAAAYTTTTTYYYYYUUUUUAUUUDUWWWWWDWWWMMMMMMMMMMMMMNNNNNNNNNNNKKKKIIIIIIIIIRYYYYKKIIIIIIIINWUWIWNNNNNNNNPPPPPZZZZZZZZZZZZZZDDDDDIIIII
+ZZZZZAAAAAAAAAAANTTTTYYYYYUUUUUUUDNNNNDDDDWWDMMMMMMMMMMMMMTTNNNNNNNNNKKKKIIIIIIIIIIIYYKKKKIIIIIINNNNIIIINNNNNNPPPPPPPPZZZZZZZZZZZZDDDDDDIIII
+ZZZZZAAAAAAAAAAAAJJTTYYYYUUUUUUUAAAAAAAAADDDDMMMMMMMMMMMMMTTNXXXNNNNRKKKKKIIIIIIIIIIJYYKKKKIIIINNNNNXXXIINNJJNPPPPPPPZZZZZZZZZZZZDDDDDDDDIII
+ZZZZZAAAAAAAAAAAAYYYYYYYYUYYUUUUAAAAAAAAAAADDMMMMMTTTTTTTTTMMXXXXNNNRRKKRROIIIIIIIBBYYYKGKIIIINNNNNNXXXXNNJJJNPPPPPPPZZZZZZZZZZZDDDDDDDDDDII
+ZZZZZAAAAAAAAAAAAAYYYYYYYYYYUUULAAAAAAAAAAADRMMMMMMTTXXTXTTTPPXVVNNNRRRKRIIIIIIIIIBGGGGGGKIIIBNNNNNXXXXXXNNJXNPPPPPPPPPPPPSSZSSZSDDDDDDDDDII
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Inputs/Day14.txt

@@ -0,0 +1,500 @@
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+p=70,98 v=8,63
+p=4,82 v=-74,-32
+p=79,1 v=63,-33
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+p=55,39 v=-82,-68
+p=91,98 v=-96,64
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+p=25,50 v=48,36
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Inputs/Day15.txt

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+^<<<>>v>>^^v<>><^><^^>v>>^^^<>^>>^>v>>^>><^><^>v<v>v^v>v^v>vvv<<^>>vv>^<vv^v^^^v<^^v<^>v>v<>^<<v<<<>>^>^^v>>v<<vvv<^<^^>^<^>><^v^v><<>v>>><<>v^<^><v<v<vv^v<<><v>vv^v^v^v>^>v<^><><<v<v>^><v<^<v<^>>><^>v>^><<<vvv<vv<^v>v>^<vv^>>>v^<v^<<^>^<<<>>v<v<v>^^v>v<^>>>v^^^<<^<^v><^><^>vv>>^>>>v>^<^<v<v>vv><^^>>^<<^>><<<v^<<<v>v<^<v>^^v<<>v>vv^<vv>^v<>v^v>>^>^^><>v><v>v^>>>>>vv^><^>v<^^vv^^>>><<<><^<v<<>^><>>>v>>^<<<<>^v^v><^v^^^<<v<v<^>>^<^<<<v^<<<>v^<>^v>v^>^<>^>^<v<><^^<<<v<<v>><>^<^<^>^v^v><<>>>v>^vv^v<>>>><v<>v^<v<<vv<v<>>v>vv><>><<v^<>^<>v^<<<vv^>>>v^^v^vv><vv^^v<^<>>^<v^>v>><>><v<^v<>v^>>><>^^>v><><>^^v^vv<^v><v<>^^v>>v>^vv<<v^^<><v><v^<><v<^vv>v<^^^^^v<>>vv^^v<^>v<v>v^v<>><><v>>v<^<^^<<v^>>>v<v^v<v>><<v^<>v<^>^^<v^>v^<v<v>v>><v>v>vv>^^v^<<>>v>>>^<v>^<><vv>><v<>vv<vv>v^v<^>vv<^>>v><^^>^><>>vv<><<<v<v>^<^^^v^v>^vv><>>>><v<>^>^<<^^^^>v^^vv<vv^^v>^^<^<^<>>^^>v><^>v>><^<^<vv^><^><<>v^v^>>^><<><v^^>>vv<v^<<^v>^<v<v><v<vv^>>v<>>v<^v<vv^v<v<<<>><><v>>^<vv<^<<><>>>><^v><^>^v<v<v^v^>^><<>^^<v>><><^^
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+vv<^vv<^^^v>^>><>><^v><><v^>^^v^><>v>^v>^^v<>>>^^^>>^v^v>^<v>^^<>^<>>^<v>><^^v<><v^>^<v>>^^^vv<^^v<<^vvv^<^vv<<<^v^v<v><v<^<<<<v^<^^vvv^^<v^vv>vv>v<<^v<vv<<<<v>^vv>^^^^<<v^>^v^<><<><v^><<>>>><^><<^<v^v^<<^v<<>^>v>^^^>vvv^<v<<>>v>>>^vv>>^<<^><<^^<<v^v^<v<<<<^<v<><vvv^^^>^^><<v^v^v^^v^<v<^<vvv>>^^vv>>>v^^>>><>^<<^<><<v>>^^^v<^^<v<<v<<v^v<^^v><vv>^<>v<<^^^^>^<^^^v>^<<><><vv^^<<>>>^<vv>v^>vvv<<^>><^^<<<><<<><>>^<<v<v<^^>v>>^^v>^>^^v<^<<<v>v><^>^^^^>^^<>^<<<<>^^^vv<^<^^<v<<v^^<<<v<v<^>v^<>>>>^^<v>v<v^<<<<v<<>v<v>^v>^vvvv><vv>v>^<^<>^<>v^<v>>v^>v<^><<v^^v>^<<v<v^^^<><^>v><>v<v>>v<><>v^^^vv<>v>v^^<^<<^>>^<v<>>^<^>v^^^<>>^<vvv<v>v>>^vv>^^v>><><<<>^vvv<vv^>^v^vv>v><v><v><v><vv>v<<>>><<>>^v^>^v><v^>v<^v<v<vv>><^<<<v<^<^<><<^<<>^>vv^v^>^>v>>><^v<v^vv^>^^<v>vvv^^<<^<v<vv<^<<v<>vvv<^<v^v>v>>>vvvv^>>^v>^^>>>^v>v^^vv^v^^>><v<^<<><>^<<v^v>vvvv<^<^vvv>v^<<><>^><^vv<^^^><>v<^>v<v<v<v<v<>v>^<<>v<vv>>vv<>^^v>>>>^>>vv>v<<v<><^^^<<>>vv><<^<^><>^<v<>v<v>>>^^>v<^><^<<><<^v^>^<^<^>v^vvv^v<><^>vvv>^v<^^>>v<<v><
+v^v<^^>>>^>>>>v^>>^>vv><>^vv^v>vv^v>v<^^<<^<^<<>>^>^<^<vv^^>^<>vv>vv<<<>v^<^v>^^<v<<>v><v<v>>>><v>v^^v>^^v^v<<<<^v<^^^><vvv<v>^^v<><vv><^v<<<v><v<>^v<^v<><^<v<^<>><^>><^<v<v<^>>>>^><vv><^>>^^v><>v^vv<<^<>><^^<vvv>><>>>>v><><>^^<<^^^v<><<>^>v>>><^^<<<<<<vv^>>v^^vv<v>>v<<<v><>v^>vv<>>v<^v^>>>v<>^^><^^vvv^^<^<>><<<v^^v>vvvv^<<<vv^^^>>^><v>>>>><<^<^v^<<^v^>^>vv><^^><<<v<^^^v>vvv<<vvv>^>^<^^<v><<^<^vv<><>><^><v>^>^<^vvv^<<<v<>v^<v<^v<v<v<><<v^^<><<<v^v>^>>^v^^<<<^<v>v^^v<><v<>v>>v<>><>v<>^<v^<^<>v<^>vvv<^v^><<<><^v^^>>v<<v^>^<>^^>><^vv^^^^vv><<vvvv<>^>v^<^v<>vvv<<>^<v>v^v^v<>>^^vv<v^>v>v<<^>>><<^v^vv^>v>><>>^v<>>^^v<<>^^^<<^^^<^>^<<>>>^vv<v>><v^v<<vv<^v^>><>vvvvv^<^>>^v><>>^^<>^v<^v<<><<>v><<^^vv<<>vvvv<v>v^>>>>v^^<><^<>^><v^>v^v<<>>vvv<^v^v^<v<^><>>v<<v>^>v^^^vvv>>^>v>v><<<>^^vv^^v^>vvv^<^>>v>v<vv>v>^^<^^^v<v>^<^<v^><<<>>^<<v>><<<>>>>>v<^v<>vvv<<><<^<^^<><^<<vvv^<<^^>^>^^^<^<vv<v<<<<vv^^>v>v<v<^<<>vv<^v>v>v^<>v>>>v<v^^<^<<v^v<<^^>^^><v><>>><<v<<>>>>^><><<<>^<><>v^>>^><><<<<>^><<v>>vvvv>^v<
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Inputs/Day3.txt

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