26 lines
731 B
C#
26 lines
731 B
C#
using System.Text.RegularExpressions;
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// string input = "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))";
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string input = File.ReadAllText("input.txt").ReplaceLineEndings("");
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int total = 0;
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Regex valid = new Regex(@"mul\((?<x>[0-9]+),(?<y>[0-9]+)\)");
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Regex dontandDo = new Regex(@"(don\'t\(\).*?do\(\))");
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input = dontandDo.Replace(input, "");
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int muls = valid.Count(input);
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List<(int x, int y)> multiplies = new();
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foreach (Match match in valid.Matches(input))
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{
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string x = match.Groups["x"].Value;
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string y = match.Groups["y"].Value;
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multiplies.Add((int.Parse(x), int.Parse(y)));
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}
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foreach ((int x, int y) in multiplies)
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{
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total += x * y;
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}
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Console.WriteLine($"muls: {muls}"); |