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[2k25] Add day 1

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Eveldee
2025-12-01 22:14:56 +01:00
parent f8843866ca
commit 0c3a8478d4
51 changed files with 4819 additions and 24970 deletions
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119
Days/Day7.cs
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@@ -1,119 +0,0 @@
using Spectre.Console;
namespace AdventOfCode.Days;
public class Day7 : Day
{
public override int Number => 7;
public override string Name => "Bridge Repair";
public override void RunPart1(bool display = true)
{
var calibrationResult = 0L;
foreach (var line in Input.AsSpan().EnumerateLines())
{
// 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(' '))
{
numbers.Add(int.Parse(equationNumbers[range]));
}
// Check if equation is possible
if (CheckEquation(target, numbers.ToArray().AsSpan()[1..], numbers[0]))
{
calibrationResult += target;
}
}
if (display)
{
AnsiConsole.MarkupLine($"[green]Total calibration result: [yellow]{calibrationResult}[/][/]");
}
return;
bool CheckEquation(long target, ReadOnlySpan<long> numbers, long result)
{
// Early return when result is greater than target because result is increasing
if (result > target)
{
return false;
}
if (numbers.IsEmpty)
{
return result == target;
}
var sumResult = result + numbers[0];
var multiplyResult = result * numbers[0];
return CheckEquation(target, numbers[1..], sumResult)
|| CheckEquation(target, numbers[1..], multiplyResult);
}
}
public override void RunPart2(bool display = true)
{
var calibrationResult = 0L;
foreach (var line in Input.AsSpan().EnumerateLines())
{
// Read input equation
var equationStart = line.IndexOf(':');
var target = long.Parse(line[..equationStart]);
var numbers = new List<long>();
var equationNumbers = line[(equationStart + 2)..];
foreach (var range in equationNumbers.Split(' '))
{
numbers.Add(int.Parse(equationNumbers[range]));
}
// Check if equation is possible
if (CheckEquation(target, numbers.ToArray().AsSpan()[1..], numbers[0]))
{
calibrationResult += target;
}
}
if (display)
{
AnsiConsole.MarkupLine($"[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];
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);
}
}
}