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2015 day 17

This commit is contained in:
Ben Harris 2023-09-20 13:22:48 -04:00
parent f7a25d42cc
commit adfbbf1b0a
2 changed files with 14 additions and 2 deletions
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1
AOC.Test/Test2015.cs
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@ -22,6 +22,7 @@ public class Test2015
[DataRow(typeof(Day14), "2655", "1059")]
[DataRow(typeof(Day15), "222870", "117936")]
[DataRow(typeof(Day16), "103", "405")]
[DataRow(typeof(Day17), "1304", "18")]
public void CheckAllDays(Type dayType, string part1, string part2)
{
Common.CheckDay(dayType, part1, part2);

15
AOC2015/Day17.cs
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@ -5,15 +5,26 @@ namespace AOC2015;
/// </summary>
public sealed class Day17 : Day
{
private List<int>? _containers;
private IEnumerable<List<int>>? _combinations;
public Day17() : base(2015, 17, "No Such Thing as Too Much")
{
}
public override void ProcessInput()
{
_containers = Input.Select(int.Parse).ToList();
_combinations = Enumerable.Range(1, (1 << _containers.Count) - 1)
.Select(i => _containers.Where((_, index) => ((1 << index) & i) != 0).ToList());
}
public override object Part1() => "";
public override object Part1() => _combinations!.Count(c => c.Sum() == 150);
public override object Part2() => "";
public override object Part2()
{
var successfulCombinations = _combinations!.Where(c => c.Sum() == 150).ToList();
var minCount = successfulCombinations.Min(c => c.Count);
return successfulCombinations.Count(c => c.Count == minCount);
}
}