37 lines
876 B
C#
37 lines
876 B
C#
namespace aoc2021;
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/// <summary>
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/// Day 1: <see href="https://adventofcode.com/2021/day/1"/>
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/// </summary>
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public sealed class Day01 : Day
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{
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private readonly List<int> _readings;
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public Day01() : base(1, "Sonar Sweep")
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{
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_readings = Input.Select(int.Parse).ToList();
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}
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public override string Part1()
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{
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var c = 0;
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for (var i = 0; i < _readings.Count - 1; i++)
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{
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if (_readings[i + 1] > _readings[i]) c++;
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}
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return $"{c}";
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}
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public override string Part2()
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{
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var c = 0;
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for (var i = 0; i < _readings.Count - 3; i++)
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{
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var prev = _readings[i] + _readings[i + 1] + _readings[i + 2];
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var curr = _readings[i + 1] + _readings[i + 2] + _readings[i + 3];
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if (curr > prev) c++;
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}
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return $"{c}";
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}
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}
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