44 lines
1.6 KiB
C#
44 lines
1.6 KiB
C#
using System.Text;
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namespace Day_03.Day_03
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{
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public class Day03
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{
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public static string InputPath = "Day 03/day-03-input.txt";
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public static string GetPart1(byte[] data)
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{
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string[] rucksackData = Encoding.UTF8.GetString(data).Split(Environment.NewLine);
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int priorityCount = 0;
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// go throu each ruchsack
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foreach (string rucksack in rucksackData.Where(x => !string.IsNullOrWhiteSpace(x)))
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{
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// split the data line down the middel
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string rucksackOne = rucksack.Substring(0, rucksack.Length / 2);
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string rucksackTwo = rucksack.Substring(rucksack.Length / 2, rucksack.Length / 2);
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char prioChar = rucksackOne.Where(x => rucksackTwo.Contains(x)).First();
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priorityCount += prioChar > 'Z' ? (prioChar - 'a' + 1) : (prioChar - 'A' + 27);
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}
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return priorityCount.ToString();
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}
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public static string GetPart2(byte[] data)
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{
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string[] rucksackData = Encoding.UTF8.GetString(data).Split(Environment.NewLine);
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int priorityCount = 0;
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for (int index = 0; index < rucksackData.Length; index += 3)
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{
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// get the 3 ruchsacks
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string[] ruchsacks = rucksackData.Skip(index).Take(3).ToArray();
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char prioChar = ruchsacks[0].Where(x => ruchsacks[1].Contains(x) && ruchsacks[2].Contains(x)).First();
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priorityCount += prioChar > 'Z' ? (prioChar - 'a' + 1) : (prioChar - 'A' + 27);
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}
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return priorityCount.ToString();
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}
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}
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}
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