day 6 part 1
continuous-integration/drone/push Build is passing
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continuous-integration/drone/push Build is passing
Details
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@ -44,6 +44,7 @@ public class DayTests
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[DataRow(typeof(Day03), "198", "230")]
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[DataRow(typeof(Day04), "4512", "1924")]
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[DataRow(typeof(Day05), "5", "12")]
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[DataRow(typeof(Day06), "5934", "")]
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public void CheckTestInputs(Type dayType, string part1, string part2)
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{
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Day.UseTestInput = true;
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@ -0,0 +1,43 @@
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namespace aoc2021;
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/// <summary>
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/// Day 6: <see href="https://adventofcode.com/2021/day/6"/>
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/// </summary>
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public sealed class Day06 : Day
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{
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private readonly List<int> _fishes;
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public Day06() : base(6, "Lanternfish")
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{
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//UseTestInput = true;
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_fishes = Input.First().Split(',').Select(int.Parse).ToList();
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}
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private static List<int> DayStep(List<int> state)
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{
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List<int> result = new();
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foreach (var fish in state)
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{
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switch (fish)
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{
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case 0:
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result.Add(6);
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result.Add(8);
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break;
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default:
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result.Add(fish - 1);
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break;
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}
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}
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return result;
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}
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public override string Part1()
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{
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var fishes = Enumerable.Range(0, 80).Aggregate(_fishes, (current, _) => DayStep(current));
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return $"{fishes.Count}";
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}
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public override string Part2() => "";
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}
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@ -0,0 +1 @@
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3,3,5,1,1,3,4,2,3,4,3,1,1,3,3,1,5,4,4,1,4,1,1,1,3,3,2,3,3,4,2,5,1,4,1,2,2,4,2,5,1,2,2,1,1,1,1,4,5,4,3,1,4,4,4,5,1,1,4,3,4,2,1,1,1,1,5,2,1,4,2,4,2,5,5,5,3,3,5,4,5,1,1,5,5,5,2,1,3,1,1,2,2,2,2,1,1,2,1,5,1,2,1,2,5,5,2,1,1,4,2,1,4,2,1,1,1,4,2,5,1,5,1,1,3,1,4,3,1,3,2,1,3,1,4,1,2,1,5,1,2,1,4,4,1,3,1,1,1,1,1,5,2,1,5,5,5,3,3,1,2,4,3,2,2,2,2,2,4,3,4,4,4,1,2,2,3,1,1,4,1,1,1,2,1,4,2,1,2,1,1,2,1,5,1,1,3,1,4,3,2,1,1,1,5,4,1,2,5,2,2,1,1,1,1,2,3,3,2,5,1,2,1,2,3,4,3,2,1,1,2,4,3,3,1,1,2,5,1,3,3,4,2,3,1,2,1,4,3,2,2,1,1,2,1,4,2,4,1,4,1,4,4,1,4,4,5,4,1,1,1,3,1,1,1,4,3,5,1,1,1,3,4,1,1,4,3,1,4,1,1,5,1,2,2,5,5,2,1,5
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@ -0,0 +1 @@
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3,4,3,1,2
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