day one part one

AdventOfCode2025/Program.cs

@@ -1 +1,6 @@
-Console.WriteLine("Advent of Code 2025");
+using AdventOfCode2025;
+
+Console.WriteLine("Advent of Code 2025");
+
+var dayOneInput = await File.ReadAllTextAsync("./Input/DayOne.txt");
+AdventSolver<SecretEntrance>.Solve(dayOneInput, 1, "Secret Entrance");

AdventOfCode2025/SecretEntrance.cs

@@ -0,0 +1,22 @@
+namespace AdventOfCode2025;
+
+public class SecretEntrance : IAdventSolution
+{
+    public AdventSolution Solve(string input)
+    {
+        var lines = input.Split('\n', StringSplitOptions.RemoveEmptyEntries | StringSplitOptions.TrimEntries);
+        
+        var current = 50;
+        var password = 0;
+        foreach (var line in lines)
+        {
+            var direction = line[0] == 'L' ? -1 : 1;
+            var distance =  int.Parse(line.Substring(1)) * direction;
+            current += distance;
+            current %= 100;
+            if(current == 0) password++;
+        }
+        
+        return new AdventSolution(password.ToString(), null);
+    }
+}