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feat(2023-02): Add day 2
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Josh Creek
@@ -0,0 +1,178 @@
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using System.Reflection;
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namespace AOC.Tests.Y2023
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{
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[TestFixture, Parallelizable(ParallelScope.All)]
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public class Day02
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{
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protected string GetThisClassName() { return this.GetType().Name; }
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private string[] realData;
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[SetUp]
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public void Setup()
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{
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realData = File.ReadAllLines(Path.Combine(TestContext.CurrentContext.TestDirectory, "Y2023", "Data", $"{GetThisClassName()}.dat"));
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}
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private record Reveal
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{
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public int RedCount { get; set; }
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public int GreenCount { get; set; }
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public int BlueCount { get; set; }
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};
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private record Game
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{
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public int Id { get; set; }
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public List<Reveal> Reveals { get; set; }
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public int MinimumReds { get; set; }
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public int MinimumGreens { get; set; }
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public int MinimumBlues { get; set; }
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public int Power { get; set; }
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};
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[TestCase(@"Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
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Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
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Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
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Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
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Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green", 8)]
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[TestCase(null, 1734)] // The actual answer
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public void Part1(string input, int? expected)
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{
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string[] lines = input != null ? input.Split("\n") : realData;
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List<Game> games = new();
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foreach (string line in lines)
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{
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// Split up the string "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green"
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// Get the number after "Game " and before ":"
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int id = int.Parse(line.Substring(5, line.IndexOf(':') - 5));
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// Get each set of reveals, separated by ";"
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string[] reveals = line.Substring(line.IndexOf(':') + 2).Split("; ");
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// For each reveal, get the number of each color
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List<Reveal> revealList = new();
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foreach (string reveal in reveals)
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{
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Reveal r = new();
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string[] colors = reveal.Split(", ");
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foreach (string color in colors)
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{
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if (color.Contains("red"))
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{
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r.RedCount = int.Parse(color.Substring(0, color.IndexOf(' ')));
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}
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else if (color.Contains("green"))
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{
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r.GreenCount = int.Parse(color.Substring(0, color.IndexOf(' ')));
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}
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else if (color.Contains("blue"))
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{
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r.BlueCount = int.Parse(color.Substring(0, color.IndexOf(' ')));
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}
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}
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revealList.Add(r);
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}
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// Add the game to the list
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games.Add(new Game
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{
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Id = id,
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Reveals = revealList,
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});
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}
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// Remove any games with more than 12 red cubes, or 13 green cubes, or 14 blue cubes
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games.RemoveAll(g => g.Reveals.Any(r => r.RedCount > 12 || r.GreenCount > 13 || r.BlueCount > 14));
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// Add up the ids of the remaining games
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int result = games.Sum(g => g.Id);
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if (expected != null)
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{
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Assert.That(result, Is.EqualTo(expected.Value));
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}
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Console.WriteLine($"Part 1: {result}");
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}
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[TestCase(@"Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green
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Game 2: 1 blue, 2 green; 3 green, 4 blue, 1 red; 1 green, 1 blue
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Game 3: 8 green, 6 blue, 20 red; 5 blue, 4 red, 13 green; 5 green, 1 red
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Game 4: 1 green, 3 red, 6 blue; 3 green, 6 red; 3 green, 15 blue, 14 red
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Game 5: 6 red, 1 blue, 3 green; 2 blue, 1 red, 2 green", 2286)]
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[TestCase(null, 70387)] // The actual answer
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public void Part2(string input, int? expected)
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{
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string[] lines = input != null ? input.Split("\n") : realData;
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List<Game> games = new();
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foreach (string line in lines)
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{
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// Split up the string "Game 1: 3 blue, 4 red; 1 red, 2 green, 6 blue; 2 green"
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// Get the number after "Game " and before ":"
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int id = int.Parse(line.Substring(5, line.IndexOf(':') - 5));
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// Get each set of reveals, separated by ";"
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string[] reveals = line.Substring(line.IndexOf(':') + 2).Split("; ");
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// For each reveal, get the number of each color
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List<Reveal> revealList = new();
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foreach (string reveal in reveals)
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{
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Reveal r = new();
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string[] colors = reveal.Split(", ");
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foreach (string color in colors)
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{
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if (color.Contains("red"))
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{
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r.RedCount = int.Parse(color.Substring(0, color.IndexOf(' ')));
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}
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else if (color.Contains("green"))
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{
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r.GreenCount = int.Parse(color.Substring(0, color.IndexOf(' ')));
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}
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else if (color.Contains("blue"))
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{
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r.BlueCount = int.Parse(color.Substring(0, color.IndexOf(' ')));
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}
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}
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revealList.Add(r);
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}
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// Get the minimum number of each colour required for each game (i,e. the highest amount of each colour in any reveal
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int minimumReds = revealList.Max(r => r.RedCount);
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int minimumGreens = revealList.Max(r => r.GreenCount);
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int minimumBlues = revealList.Max(r => r.BlueCount);
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int power = minimumReds * minimumGreens * minimumBlues;
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// Add the game to the list
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games.Add(new Game
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{
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Id = id,
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Reveals = revealList,
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MinimumReds = minimumReds,
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MinimumGreens = minimumGreens,
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MinimumBlues = minimumBlues,
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Power = power,
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});
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}
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int result = games.Sum(g => g.Power);
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if (expected != null)
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{
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Assert.That(result, Is.EqualTo(expected.Value));
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}
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Console.WriteLine($"Part 2: {result}");
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}
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}
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}
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