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chore(*): Move all C# solutions into a C# folder to make it clearer which languages are used
This commit is contained in:
Josh Creek
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namespace AOC.Tests.Y2023;
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[TestFixture]
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[Parallelizable(ParallelScope.All)]
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public class Day05
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{
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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",
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$"{GetThisClassName()}.dat"));
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}
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protected string GetThisClassName() { return GetType().Name; }
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private string[] realData;
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private record Map
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{
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public long DestinationRangeStart { get; set; }
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public long SourceRangeStart { get; set; }
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public long RangeLength { get; set; }
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}
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private record Almanac
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{
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public List<long> SeedsToBePlanted { get; set; }
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public List<Map> SeedToSoilMap { get; set; }
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public List<Map> SoilToFertiliserMap { get; set; }
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public List<Map> FertiliserToWaterMap { get; set; }
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public List<Map> WaterToLightMap { get; set; }
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public List<Map> LightToTemperatureMap { get; set; }
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public List<Map> TemperatureToHumidityMap { get; set; }
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public List<Map> HumidityToLocationMap { get; set; }
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}
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private List<Map> GetMap(string[] lines, string mapName)
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{
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List<Map> map = new();
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int lineNumber = 0;
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while (lines[lineNumber] != mapName)
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{
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lineNumber++;
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}
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lineNumber++;
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while (lineNumber < lines.Length && lines[lineNumber] != "")
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{
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string[] mapLine = lines[lineNumber].Split(" ");
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map.Add(new Map
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{
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DestinationRangeStart = long.Parse(mapLine[0]),
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SourceRangeStart = long.Parse(mapLine[1]),
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RangeLength = long.Parse(mapLine[2])
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});
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lineNumber++;
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}
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return map;
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}
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private long GetValueUsingMaps(List<Map> maps, long sourceValue)
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{
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// is the seed number within any of the ranges for the seed to soil map?
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if (maps.Any(m => m.SourceRangeStart + m.RangeLength >= sourceValue && sourceValue >= m.SourceRangeStart))
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{
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Map appropriateMap = maps
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.OrderBy(m => m.DestinationRangeStart)
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.First(m =>
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m.SourceRangeStart + m.RangeLength >= sourceValue && sourceValue >= m.SourceRangeStart);
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// Calculate how far to move from the start of the source range to our seed number
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long increment = sourceValue - appropriateMap.SourceRangeStart;
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return appropriateMap.DestinationRangeStart + increment;
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}
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// Just use the same value as the source
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return sourceValue;
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}
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[TestCase(@"seeds: 79 14 55 13
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seed-to-soil map:
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50 98 2
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52 50 48
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soil-to-fertilizer map:
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0 15 37
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37 52 2
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39 0 15
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fertilizer-to-water map:
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49 53 8
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0 11 42
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42 0 7
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57 7 4
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water-to-light map:
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88 18 7
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18 25 70
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light-to-temperature map:
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45 77 23
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81 45 19
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68 64 13
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temperature-to-humidity map:
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0 69 1
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1 0 69
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humidity-to-location map:
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60 56 37
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56 93 4", 35)]
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[TestCase(null, 265018614)] // 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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Almanac almanac = new();
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// Get the seeds from the first line
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almanac.SeedsToBePlanted = lines[0].Split(": ")[1].Split(" ").Select(long.Parse).ToList();
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// Get the maps when we don't know what line number they occur on
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almanac.SeedToSoilMap = GetMap(lines, "seed-to-soil map:");
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almanac.SoilToFertiliserMap = GetMap(lines, "soil-to-fertilizer map:");
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almanac.FertiliserToWaterMap = GetMap(lines, "fertilizer-to-water map:");
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almanac.WaterToLightMap = GetMap(lines, "water-to-light map:");
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almanac.LightToTemperatureMap = GetMap(lines, "light-to-temperature map:");
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almanac.TemperatureToHumidityMap = GetMap(lines, "temperature-to-humidity map:");
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almanac.HumidityToLocationMap = GetMap(lines, "humidity-to-location map:");
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List<long> locations = new();
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foreach (long seed in almanac.SeedsToBePlanted)
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{
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// Get the soil, fertilizer, water, light, temperature, humidity, and location
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long soil = GetValueUsingMaps(almanac.SeedToSoilMap, seed);
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long fertiliser = GetValueUsingMaps(almanac.SoilToFertiliserMap, soil);
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long water = GetValueUsingMaps(almanac.FertiliserToWaterMap, fertiliser);
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long light = GetValueUsingMaps(almanac.WaterToLightMap, water);
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long temperature = GetValueUsingMaps(almanac.LightToTemperatureMap, light);
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long humidity = GetValueUsingMaps(almanac.TemperatureToHumidityMap, temperature);
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long location = GetValueUsingMaps(almanac.HumidityToLocationMap, humidity);
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Console.WriteLine($"Seed {seed} grows in location {location}");
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locations.Add(location);
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}
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long result = locations.Min();
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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(@"seeds: 79 14 55 13
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seed-to-soil map:
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50 98 2
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52 50 48
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soil-to-fertilizer map:
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0 15 37
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37 52 2
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39 0 15
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fertilizer-to-water map:
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49 53 8
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0 11 42
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42 0 7
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57 7 4
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water-to-light map:
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88 18 7
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18 25 70
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light-to-temperature map:
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45 77 23
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81 45 19
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68 64 13
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temperature-to-humidity map:
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0 69 1
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1 0 69
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humidity-to-location map:
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60 56 37
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56 93 4", 46)]
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[TestCase(null, 63179500)] // 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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Almanac almanac = new();
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// Get the maps when we don't know what line number they occur on
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almanac.SeedToSoilMap = GetMap(lines, "seed-to-soil map:");
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almanac.SoilToFertiliserMap = GetMap(lines, "soil-to-fertilizer map:");
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almanac.FertiliserToWaterMap = GetMap(lines, "fertilizer-to-water map:");
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almanac.WaterToLightMap = GetMap(lines, "water-to-light map:");
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almanac.LightToTemperatureMap = GetMap(lines, "light-to-temperature map:");
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almanac.TemperatureToHumidityMap = GetMap(lines, "temperature-to-humidity map:");
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almanac.HumidityToLocationMap = GetMap(lines, "humidity-to-location map:");
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long result = long.MaxValue;
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object lockObj = new();
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List<long> values = lines[0].Split(": ")[1].Split(" ").Select(long.Parse).ToList();
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Parallel.For(0, values.Count / 2, i =>
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{
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long startRange = values[i * 2];
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long rangeLength = values[i * 2 + 1];
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for (long seed = startRange; seed < startRange + rangeLength; seed++)
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{
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// Get the soil, fertilizer, water, light, temperature, humidity, and location
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long soil = GetValueUsingMaps(almanac.SeedToSoilMap, seed);
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long fertiliser = GetValueUsingMaps(almanac.SoilToFertiliserMap, soil);
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long water = GetValueUsingMaps(almanac.FertiliserToWaterMap, fertiliser);
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long light = GetValueUsingMaps(almanac.WaterToLightMap, water);
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long temperature = GetValueUsingMaps(almanac.LightToTemperatureMap, light);
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long humidity = GetValueUsingMaps(almanac.TemperatureToHumidityMap, temperature);
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long location = GetValueUsingMaps(almanac.HumidityToLocationMap, humidity);
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lock (lockObj)
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{
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if (location < result)
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{
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result = location;
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}
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}
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}
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});
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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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