90 lines
1.9 KiB
C#
90 lines
1.9 KiB
C#
namespace AOC2022.Puzzles;
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internal class Day3 : IPuzzle
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{
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private readonly string[] _linesFromFile;
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private readonly int noOfRuckSacks;
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private string[] _leftComparments;
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private string[] _rightCompartments;
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public Day3(string[] linesFromFile)
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{
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_linesFromFile = linesFromFile;
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noOfRuckSacks = linesFromFile.Length;
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SplitRuckSacks();
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}
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private void SplitRuckSacks()
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{
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_leftComparments = new string[noOfRuckSacks];
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_rightCompartments = new string[noOfRuckSacks];
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var index = 0;
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foreach (var line in _linesFromFile)
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{
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var ruckSack = line.Trim();
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var left = ruckSack[..(ruckSack.Length / 2)];
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var right = ruckSack[(ruckSack.Length / 2)..];
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_leftComparments[index] = left;
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_rightCompartments[index] = right;
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index++;
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}
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}
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public void FirstPuzzle()
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{
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var prioritySum = 0;
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for (int i = 0; i < noOfRuckSacks; i++)
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{
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char duplicateItem = ' ';
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foreach (var item in _leftComparments[i])
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{
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if (_rightCompartments[i].Contains(item))
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{
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duplicateItem = item;
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break;
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}
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}
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prioritySum += EvaluatePriority(duplicateItem);
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}
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Console.WriteLine(prioritySum.ToString());
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}
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public void SecondPuzzle()
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{
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var prioritySum = 0;
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for (int i = 0; i < noOfRuckSacks; i += 3)
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{
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var elf1Sack = _linesFromFile[i].Trim();
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var elf2Sack = _linesFromFile[i + 1].Trim();
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var elf3Sack = _linesFromFile[i + 2].Trim();
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char authenticItem = ' ';
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foreach (var item in elf1Sack)
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{
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if (elf2Sack.Contains(item) && elf3Sack.Contains(item))
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{
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authenticItem = item;
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break;
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}
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}
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prioritySum += EvaluatePriority(authenticItem);
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}
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Console.WriteLine(prioritySum.ToString());
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}
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private static int EvaluatePriority(char ruckSackItem)
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{
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if (char.IsUpper(ruckSackItem))
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{
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return (ruckSackItem - 'A') + 27;
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}
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else if (char.IsLower(ruckSackItem))
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{
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return (ruckSackItem - 'a') + 1;
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}
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else
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{
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return 0;
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}
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}
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}
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