day 11 part 1

AdventOfCode/Day11.cs

@@ -0,0 +1,60 @@
+
+namespace AdventOfCode;
+
+public class Day11 : BaseDay
+{
+    public override ValueTask<string> Solve_1()
+    {
+        List<Stone> stones = GetInput();
+
+        for (int i = 0; i < 25; ++i)
+        {
+            Blink(stones);
+        }
+
+        return new(stones.Count.ToString());
+    }
+
+    public override ValueTask<string> Solve_2()
+    {
+        return new("");
+    }
+
+    private void Blink(List<Stone> stones)
+    {
+        for (int i = 0; i < stones.Count; i++)
+        {
+            if (stones[i].Value == 0)
+            {
+                stones[i].Value++;
+            }
+            else if (stones[i].Value.ToString().Length % 2 == 0)
+            {
+                string stoneNumberString = stones[i].Value.ToString();
+                long one = long.Parse(stoneNumberString.Substring(0, stoneNumberString.Length / 2));
+                long two = long.Parse(stoneNumberString.Substring(stoneNumberString.Length / 2));
+
+                stones[i].Value = one;
+                stones.Insert(i + 1, new Stone(two));
+                i++;
+            }
+            else
+            {
+                stones[i].Value *= 2024;
+            }
+        }
+    }
+
+    private List<Stone> GetInput()
+    { 
+        return File.ReadAllText(InputFilePath)
+            .Split(" ", StringSplitOptions.RemoveEmptyEntries)
+            .Select(x => new Stone(long.Parse(x)))
+            .ToList();
+    }
+
+    private class Stone(long Value)
+    {
+        public long Value { get; set; } = Value;
+    }
+}