diff --git a/Days/Day4.cs b/Days/Day4.cs
new file mode 100644
index 0000000..5dd2b0c
--- /dev/null
+++ b/Days/Day4.cs
@@ -0,0 +1,1067 @@
+using Spectre.Console;
+
+namespace AdventOfCode.Days;
+
+public class Day4 : Day
+{
+    public override int Number => 4;
+    public override string Name => "Camp Cleanup";
+    public override void RunPart1()
+    {
+        int overlaps = 0;
+        foreach (var line in Input.ReadAllLines())
+        {
+            var sections = line.Split(',')
+                .Select(p => p.Split('-'))
+                .Select(p => new { Start = int.Parse(p[0]), End = int.Parse(p[1]) })
+                .ToArray();
+
+            var firstSection = sections[0];
+            var secondSection = sections[1];
+            
+            // Check if first section contains second section
+            if (firstSection.Start <= secondSection.Start && firstSection.End >= secondSection.End)
+            {
+                overlaps++;
+            }
+            // Check if second section contains first section
+            else if (secondSection.Start <= firstSection.Start && secondSection.End >= firstSection.End)
+            {
+                overlaps++;
+            }
+        }
+        
+        AnsiConsole.MarkupLine($"[green]Overlapping sections: [yellow]{overlaps}[/][/]");
+    }
+
+    public override void RunPart2()
+    {
+        int overlaps = 0;
+        foreach (var line in Input.ReadAllLines())
+        {
+            var sections = line.Split(',')
+                .Select(p => p.Split('-'))
+                .Select(p => new { Start = int.Parse(p[0]), End = int.Parse(p[1]) })
+                .ToArray();
+
+            var firstSection = sections[0];
+            var secondSection = sections[1];
+            
+            // Check if first section overlaps second
+            if (firstSection.Start <= secondSection.End && firstSection.End >= secondSection.Start)
+            {
+                overlaps++;
+            }
+        }
+        
+        AnsiConsole.MarkupLine($"[green]Overlapping sections: [yellow]{overlaps}[/][/]");
+    }
+
+    #region Input
+
+    public const string Input =
+    """
+    8-18,10-19
+    12-69,8-15
+    62-77,36-50
+    26-27,26-91
+    16-23,24-63
+    17-43,18-44
+    29-68,29-70
+    15-90,28-91
+    8-39,10-40
+    47-64,27-63
+    8-77,78-95
+    3-65,66-71
+    20-22,21-98
+    52-53,53-98
+    29-30,29-44
+    86-90,38-87
+    33-99,31-31
+    62-80,82-90
+    45-55,33-54
+    57-62,58-63
+    8-59,8-98
+    7-23,1-22
+    12-36,22-37
+    1-31,32-80
+    94-96,46-95
+    5-90,4-40
+    5-5,6-52
+    74-86,7-87
+    1-4,6-38
+    49-65,49-64
+    21-21,22-99
+    48-61,11-88
+    46-51,46-50
+    13-87,88-88
+    5-6,6-99
+    9-40,52-96
+    4-93,5-92
+    78-88,77-86
+    39-72,71-73
+    31-90,19-91
+    52-53,53-94
+    2-4,3-62
+    92-95,46-91
+    41-42,41-94
+    96-98,8-97
+    9-75,9-74
+    75-85,67-76
+    27-32,29-32
+    69-93,70-94
+    17-80,18-80
+    68-68,12-69
+    36-80,35-60
+    41-86,41-42
+    18-82,83-83
+    48-97,90-92
+    1-57,16-58
+    39-89,39-88
+    17-17,16-53
+    98-99,8-97
+    24-71,9-48
+    37-38,37-52
+    9-80,10-80
+    1-18,19-57
+    55-67,58-73
+    82-84,85-85
+    23-92,22-87
+    9-97,92-96
+    11-93,94-98
+    16-93,17-17
+    81-97,63-80
+    67-92,67-92
+    63-67,62-64
+    15-66,67-81
+    13-20,13-13
+    83-83,4-82
+    10-54,6-6
+    13-69,8-11
+    18-19,18-94
+    9-46,8-19
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+    35-94,95-95
+    21-56,57-57
+    3-44,3-39
+    24-95,79-89
+    33-59,34-34
+    23-25,21-26
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+    37-76,38-77
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+    11-44,45-83
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+    20-21,20-30
+    22-87,86-89
+    44-44,43-47
+    56-84,56-57
+    8-80,9-86
+    1-50,5-51
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+    3-98,3-97
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+    70-80,24-69
+    28-55,43-50
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+    29-61,29-49
+    19-71,18-71
+    21-36,21-36
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+    4-5,5-95
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+    1-23,4-22
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+    3-62,33-61
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+    27-57,28-56
+    49-98,40-92
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+    3-81,2-82
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+    7-37,6-17
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+    2-29,1-86
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+    59-59,59-99
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+    7-62,7-62
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+    17-18,18-92
+    14-35,11-34
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+    35-59,34-59
+    65-82,68-83
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+    11-15,14-49
+    3-8,13-98
+    3-50,4-49
+    """;
+
+    #endregion
+}
\ No newline at end of file