feat(2024-03): Add day 3

2026-07-13 11:13:47 +00:00 · 2024-12-03 21:43:12 +00:00
parent 70d37b1807
commit 7219cdab40
3 changed files with 139 additions and 0 deletions
@@ -0,0 +1,98 @@
+using System.Text.RegularExpressions;
+
+namespace AOC.Tests.Y2024;
+
+[TestFixture]
+[Parallelizable(ParallelScope.All)]
+public class Day03
+{
+    [SetUp]
+    public void Setup()
+    {
+        realData = File.ReadAllLines(Path.Combine(TestContext.CurrentContext.TestDirectory, "Y2024", "Data",
+            $"{GetThisClassName()}.dat"));
+    }
+
+    protected string GetThisClassName() { return GetType().Name; }
+    private string[] realData;
+
+    [TestCase("xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))", 161)]
+    [TestCase(null, 168539636)] // The actual answer
+    public void Part1(string? input, int? expected)
+    {
+        string[] lines = input != null ? input.Split("\n") : realData;
+
+        int result = 0;
+
+        foreach (string line in lines)
+        {
+            MatchCollection instructions = Regex.Matches(line, @"mul\((\d{1,3}),(\d{1,3})\)");
+
+            foreach (Match match in instructions)
+            {
+                if (match.Success)
+                {
+                    int firstNumber = int.Parse(match.Groups[1].Value);
+                    int secondNumber = int.Parse(match.Groups[2].Value);
+
+                    result += firstNumber * secondNumber;
+                }
+            }
+        }
+
+        if (expected != null)
+        {
+            Assert.That(result, Is.EqualTo(expected.Value));
+        }
+
+        Console.WriteLine($"Part 1: {result}");
+    }
+
+    [TestCase("xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))", 48)]
+    [TestCase(null, 97529391)] // The actual answer
+    public void Part2(string? input, int? expected)
+    {
+        string[] lines = input != null ? input.Split("\n") : realData;
+
+        int result = 0;
+        bool enableMuls = true;
+
+        foreach (string line in lines)
+        {
+            MatchCollection instructions = Regex.Matches(line,
+                @"(?<do>do\(\))|(?<dont>don't\(\))|mul\((?<num1>\d{1,3}),(?<num2>\d{1,3})\)");
+
+            foreach (Match match in instructions)
+            {
+                if (match.Success)
+                {
+                    if (match.Groups["do"].Success)
+                    {
+                        enableMuls = true;
+                    }
+                    else if (match.Groups["dont"].Success)
+                    {
+                        enableMuls = false;
+                    }
+                    else if (match.Groups["num1"].Success && match.Groups["num2"].Success)
+                    {
+                        if (enableMuls)
+                        {
+                            int firstNumber = int.Parse(match.Groups["num1"].Value);
+                            int secondNumber = int.Parse(match.Groups["num2"].Value);
+
+                            result += firstNumber * secondNumber;
+                        }
+                    }
+                }
+            }
+        }
+
+        if (expected != null)
+        {
+            Assert.That(result, Is.EqualTo(expected.Value));
+        }
+
+        Console.WriteLine($"Part 2: {result}");
+    }
+}