wip day 2

AdventOfCode/Problems/AOC2025/Day1/SecretEntrance.cs

@@ -35,21 +35,18 @@ internal class SecretEntrance : Problem<int, int>
 		foreach (var item in Input)
 		{
 			var vStart = v;
-			var sign = int.Sign(item);
-			var curC = 0;
 
 			v += item;
 			if (item > 0)
-				curC += (int)Math.Floor(v / (float)LOCK_SIZE);
+				c += (int)Math.Floor(v / (float)LOCK_SIZE);
 			else
 			{
 				var d = v / (float)LOCK_SIZE;
 				var fl = Math.Floor(d);
-				curC += (int)Math.Abs(fl) - (vStart == 0 ? 1 : 0);
+				c += (int)Math.Abs(fl) - (vStart == 0 ? 1 : 0);
 				if (fl == d)
-					curC += 1;
+					c += 1;
 			}
-			c += curC;
 			v = v.Mod(LOCK_SIZE);
 		}
 		Part2 = c;

AdventOfCode/Problems/AOC2025/Day2/GiftShop.cs

@@ -0,0 +1,42 @@
+using System;
+using System.Collections.Generic;
+using System.Reflection.Metadata;
+using System.Text;
+
+using ZLinq;
+
+namespace AdventOfCode.Problems.AOC2025.Day2;
+
+[ProblemInfo(2025, 2, "Gift Shop")]
+internal class GiftShop : Problem<long, long>
+{
+	private IdRange[] _ranges = [];
+	public override void CalculatePart1()
+	{
+		throw new NotImplementedException();
+	}
+
+	public static List<long> GetDoubleSequences(IdRange range)
+	{
+		var minDigits = range.Min.DigitCount() / 2;
+		var maxDigits = range.Max.DigitCount() / 2;
+		throw new NotImplementedException();
+	}
+
+	public override void CalculatePart2()
+	{
+		throw new NotImplementedException();
+	}
+
+	public override void LoadInput()
+	{
+		var text = ReadInputText("sample.txt");
+		_ranges = text.Split(',')
+			.AsValueEnumerable()
+			.Select(r => r.Split('-').Select(int.Parse))
+			.Select(r => new IdRange(r.First(), r.Last()))
+			.ToArray();
+	}
+
+	public record IdRange(int Min, int Max);
+}

AdventOfCode/Runner/ExtraMath.cs

@@ -34,4 +34,14 @@ public static class ExtraMath
 	{
 		return T.Min(a, b);
 	}
+
+	public static T Mod<T>(this T value, T divisor) where T : INumber<T>
+	{
+		T remainder = value % divisor;
+
+		if (remainder < T.Zero)
+			return remainder + divisor;
+		else
+			return remainder;
+	}
 }

AdventOfCode/Utils/Extensions.cs

@@ -13,13 +13,5 @@ public static class Extensions
 		return string.Join(delim, data);
 	}
 
-	public static T Mod<T>(this T value, T divisor) where T : INumber<T>
-	{
-		T remainder = value % divisor;
 	
-		if (remainder < T.Zero)
-			return remainder + divisor;
-		else
-			return remainder;
-	}
 }