Day 3

AdventOfCode/Problems/AOC2024/Day3/MullItOver.cs

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+using AdventOfCode.Runner.Attributes;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Text.RegularExpressions;
+using System.Threading.Tasks;
+
+namespace AdventOfCode.Problems.AOC2024.Day3;
+[ProblemInfo(2024, 3, "Mull It Over")]
+internal partial class MullItOver : Problem<int, int>
+{
+	private string _data = string.Empty;
+
+	public override void CalculatePart1()
+	{
+		var matches = Mul().Matches(_data);
+		Part1 = matches.Select(m => (int.Parse(m.Groups["a"].Value), int.Parse(m.Groups["b"].Value))).Select(v => v.Item1 * v.Item2).Sum();
+	}
+
+	public override void CalculatePart2()
+	{
+		var doing = true;
+		var muls = DosAndDonts().Matches(_data);
+		foreach (Match match in muls)
+		{
+			switch (match.Value)
+			{
+				case ['d', 'o', 'n', ..]:
+					doing = false;
+					break;
+				case ['d', 'o', ..]:
+					doing = true;
+					break;
+				default:
+					if (!doing)
+						continue;
+					Part2 += int.Parse(match.Groups["a"].Value) * int.Parse(match.Groups["b"].Value);
+					break;
+			}
+		}
+	}
+
+	public override void LoadInput()
+	{
+		 _data = ReadInputText("input.txt");
+	}
+
+	[GeneratedRegex("(mul\\((?<a>\\d+)\\,(?<b>\\d+)\\))|(do\\(\\))|(don't\\(\\))")]
+	private static partial Regex DosAndDonts();
+	[GeneratedRegex("mul\\((?<a>\\d+)\\,(?<b>\\d+)\\)")]
+	private static partial Regex Mul();
+}