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ben revised this gist 2 days ago. Go to revision
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ben revised this gist 2 days ago. Go to revision
1 file changed, 131 insertions
Day1.cs(file created)
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| 1 | + | using System; | |
| 2 | + | using System.IO; | |
| 3 | + | using BenTek.AdventOfCode.TwentyTwentyFive.Interfaces; | |
| 4 | + | ||
| 5 | + | namespace BenTek.AdventOfCode.TwentyTwentyFive.Days | |
| 6 | + | { | |
| 7 | + | class Day1 : IPuzzle | |
| 8 | + | { | |
| 9 | + | /// <inheritdoc /> | |
| 10 | + | public string ExpectedTestValue1 => "5"; | |
| 11 | + | ||
| 12 | + | public int StartingPosition => 50; | |
| 13 | + | public int Limit => 99; | |
| 14 | + | public string[] WrongAnswers => ["461", "5572", "7139", "7214", "7255", "6563", "8854", "6793", "8102", "7823", "7815"]; // 6684 | |
| 15 | + | ||
| 16 | + | public string TestDataPath => | |
| 17 | + | Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Data", "Day1", "sample_input.txt"); | |
| 18 | + | public string RealDataPath => | |
| 19 | + | Path.Combine(AppDomain.CurrentDomain.BaseDirectory, "Data", "Day1", "input.txt"); | |
| 20 | + | ||
| 21 | + | public bool Test() | |
| 22 | + | { | |
| 23 | + | return true; | |
| 24 | + | } | |
| 25 | + | ||
| 26 | + | public string Run() | |
| 27 | + | { | |
| 28 | + | string input = Utilities.FileLoader.LoadFile(RealDataPath); | |
| 29 | + | return Logic(input); | |
| 30 | + | } | |
| 31 | + | ||
| 32 | + | /// <inheritdoc /> | |
| 33 | + | public string Logic(string input) | |
| 34 | + | { | |
| 35 | + | string output1 = string.Empty; | |
| 36 | + | ||
| 37 | + | string[] lines = input.Split("\n"); | |
| 38 | + | if (lines == null) | |
| 39 | + | { | |
| 40 | + | throw new Exception("Cannot split test input data"); | |
| 41 | + | } | |
| 42 | + | ||
| 43 | + | int[] values = new int[lines.Length]; | |
| 44 | + | ||
| 45 | + | for (int i = 0; i < lines.Length; i++) | |
| 46 | + | { | |
| 47 | + | string line = lines[i]; | |
| 48 | + | string sign = line.Substring(0, 1); | |
| 49 | + | string value = line.TrimStart(sign.ToCharArray()); | |
| 50 | + | int parsedValue = int.Parse(value); | |
| 51 | + | int coefficient = sign.Contains("R") ? 1 : -1; | |
| 52 | + | values[i] = parsedValue * coefficient; | |
| 53 | + | } | |
| 54 | + | ||
| 55 | + | int zeroCount = 0; | |
| 56 | + | int wrapCount = 0; | |
| 57 | + | int currentValue = StartingPosition; | |
| 58 | + | ||
| 59 | + | for (int i = 0; i < values.Length; i++) | |
| 60 | + | { | |
| 61 | + | currentValue = Wrap(currentValue, values[i], ref wrapCount); | |
| 62 | + | ||
| 63 | + | // Console.WriteLine($"The dial is rotated {values[i]} to point at {currentValue}"); | |
| 64 | + | ||
| 65 | + | if (currentValue == 0) | |
| 66 | + | { | |
| 67 | + | zeroCount++; | |
| 68 | + | } | |
| 69 | + | } | |
| 70 | + | ||
| 71 | + | output1 = zeroCount.ToString(); | |
| 72 | + | string output2 = (wrapCount).ToString(); | |
| 73 | + | ||
| 74 | + | if (!CheckOutput(output1)) | |
| 75 | + | { | |
| 76 | + | return $"Error - {output1} is wrong answer for 1"; | |
| 77 | + | } | |
| 78 | + | ||
| 79 | + | if (!CheckOutput(output2)) | |
| 80 | + | { | |
| 81 | + | return $"Error - {output2} is wrong answer for 2"; | |
| 82 | + | } | |
| 83 | + | ||
| 84 | + | return $"1: {output1}, 2: {output2}"; | |
| 85 | + | } | |
| 86 | + | ||
| 87 | + | private int Wrap(int currentState, int delta, ref int wrapCount) | |
| 88 | + | { | |
| 89 | + | bool positive = delta > 0; | |
| 90 | + | int absDelta = (int)MathF.Abs(delta); | |
| 91 | + | ||
| 92 | + | for (int i = 0; i < absDelta; i++) | |
| 93 | + | { | |
| 94 | + | if (positive) | |
| 95 | + | { | |
| 96 | + | currentState++; | |
| 97 | + | } | |
| 98 | + | else | |
| 99 | + | { | |
| 100 | + | currentState--; | |
| 101 | + | } | |
| 102 | + | ||
| 103 | + | if (currentState < 0) | |
| 104 | + | { | |
| 105 | + | currentState += 100; | |
| 106 | + | } | |
| 107 | + | else if (currentState > Limit) | |
| 108 | + | { | |
| 109 | + | currentState -= 100; | |
| 110 | + | } | |
| 111 | + | ||
| 112 | + | if (currentState == 0) | |
| 113 | + | { | |
| 114 | + | wrapCount++; | |
| 115 | + | } | |
| 116 | + | } | |
| 117 | + | ||
| 118 | + | return currentState; | |
| 119 | + | } | |
| 120 | + | ||
| 121 | + | private bool CheckOutput(string output) | |
| 122 | + | { | |
| 123 | + | if (WrongAnswers.Contains(output)) | |
| 124 | + | { | |
| 125 | + | return false; | |
| 126 | + | } | |
| 127 | + | ||
| 128 | + | return true; | |
| 129 | + | } | |
| 130 | + | } | |
| 131 | + | } | |
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