115 lines
3.5 KiB
C#
115 lines
3.5 KiB
C#
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/*
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* Advent of Code 2016
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* Day 7 (Part 1 and 2)
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*/
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using System;
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using System.Collections.Generic;
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using System.IO;
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namespace adventofcode
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{
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class bscott07
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{
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public static int GetTLSIPCount(string[] input)
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{
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int ipCount = 0;
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for (int i = 0; i < input.Length; i++)
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{
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bool insideBracket = false;
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bool hasMirrorSequence = false;
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for (int j = 0; j < input[i].Length - 3; j++)
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{
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if (input[i][j] == '[')
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{
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insideBracket = true;
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continue;
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}
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else if (input[i][j] == ']')
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{
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insideBracket = false;
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continue;
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}
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if ((input[i][j] == input[i][j + 3] && input[i][j + 1] == input[i][j + 2])
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&& (input[i][j] != input[i][j + 1] && input[i][j + 2] != input[i][j + 3]))
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if (insideBracket)
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break;
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else
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hasMirrorSequence = true;
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}
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if (!insideBracket && hasMirrorSequence)
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ipCount++;
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}
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return ipCount;
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}
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public static int GetSSLIPCount(string[] input)
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{
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int ipCount = 0;
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for (int i = 0; i < input.Length; i++)
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{
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bool insideBracket = false;
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List<String> babSequences = new List<string>();
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List<String> abaSequences = new List<string>();
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for (int j = 0; j < input[i].Length - 2; j++)
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{
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if (input[i][j] == '[')
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{
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insideBracket = true;
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continue;
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}
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else if (input[i][j] == ']')
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{
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insideBracket = false;
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continue;
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}
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if (insideBracket)
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{
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if (input[i][j] == input[i][j + 2] && input[i][j] != input[i][j + 1])
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babSequences.Add(input[i].Substring(j + 1, 1) + input[i].Substring(j, 1) + input[i].Substring(j + 1, 1)); // pre flip it
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}
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else
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{
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if (input[i][j] == input[i][j + 2] && input[i][j] != input[i][j + 1])
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abaSequences.Add(input[i].Substring(j, 3));
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}
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}
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if (babSequences.Count > 0 && abaSequences.Count > 0)
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{
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for (int j = 0; j < abaSequences.Count; j++)
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{
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if (babSequences.Contains(abaSequences[j]))
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{
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ipCount++;
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break;
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}
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}
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}
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}
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return ipCount;
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}
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}
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class Program
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{
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static void Main(string[] args)
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{
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string[] input = File.ReadAllLines("input_day07.txt");
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Console.WriteLine("Part 1 - TLS IP Count: {0}", bscott07.GetTLSIPCount(input));
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Console.WriteLine("Part 2 - SSL IP Count: {0}", bscott07.GetSSLIPCount(input));
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Console.ReadLine();
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}
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}
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}
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