day 1 part 1

KaterynaKateryna · Dec 1, 2023 · cf61f28 · cf61f28
1 parent d1e34e2
commit cf61f28
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diff --git a/AdventOfCode/Day01.cs b/AdventOfCode/Day01.cs
@@ -1,4 +1,6 @@
-namespace AdventOfCode;
+using System.Text.RegularExpressions;
+
+namespace AdventOfCode;
 
 public class Day01 : BaseDay
 {
@@ -9,7 +11,20 @@ public Day01()
         _input = File.ReadAllText(InputFilePath);
     }
 
-    public override ValueTask<string> Solve_1() => new($"Solution to {ClassPrefix} {CalculateIndex()}, part 1");
+    public override ValueTask<string> Solve_1()
+    {
+        string[] lines = _input.Split(Environment.NewLine);
+        long sum = 0;
+
+        foreach (string item in lines)
+        {
+            MatchCollection matches = Regex.Matches(item, "[0-9]");
+            int calibrationValue = int.Parse(matches.First().Value + matches.Last().Value);
+            sum += calibrationValue;
+        }
+
+        return new(sum.ToString());
+    }
 
     public override ValueTask<string> Solve_2() => new($"Solution to {ClassPrefix} {CalculateIndex()}, part 2");
 }