2024 day 3 part 1

Author: deckelmouck

2024/Day03/Solution.cs

@@ -0,0 +1,50 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Runtime;
+using System.Security.Cryptography.X509Certificates;
+using System.Text.RegularExpressions;
+
+namespace adventofcode.Year2024.Day03;
+
+public class Solution : BaseSolution, ISolver
+{
+    public void SolvePart1()
+    {
+        //var inputFilePath = GetInputFilePath("test");
+        var inputFilePath = GetInputFilePath();
+
+        string[] lines = File.ReadAllLines(inputFilePath);
+
+        string regexpattern = @"mul\(\d{1,3},\d{1,3}\)";
+
+        List<string> allmatches = new();
+
+        long totalSum = 0;
+        foreach (var line in lines)
+        {
+            var matches = Regex.Matches(line, regexpattern);
+
+            foreach(Match match in matches)
+            {
+                allmatches.Add(match.Value);
+
+                string item = match.ToString().Replace("mul(", "").Replace(")", "");
+
+                long x = long.Parse(item.Split(',')[0]);
+                long y = long.Parse(item.Split(',')[1]);
+
+                totalSum += x * y;
+            }
+        }
+
+        Console.WriteLine($"allmatches.count = {allmatches.Count}");
+        Console.WriteLine($"total sum is: {totalSum}");
+    
+    }
+
+    public void SolvePart2()
+    {
+        throw new NotImplementedException();
+    }
+}