23 lines
700 B
C#
23 lines
700 B
C#
namespace AOC2022;
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/// <summary>
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/// Day 3: <a href="https://adventofcode.com/2022/day/3"/>
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/// </summary>
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public sealed class Day03 : Day
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{
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public Day03() : base(2022, 3, "Rucksack Reorganization")
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{
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}
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public override void ProcessInput()
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{
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}
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public override object Part1() =>
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Input.Sum(rucksack => RankItem(rucksack.Chunk(rucksack.Length / 2).Aggregate<IEnumerable<char>>((a, b) => a.Intersect(b)).Single()));
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public override object Part2() =>
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Input.Chunk(3).Sum(group => RankItem(group.Aggregate<IEnumerable<char>>((a, b) => a.Intersect(b)).Single()));
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private static int RankItem(char item) => item - (char.IsUpper(item) ? '&' : '`');
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} |