コード例 #1
0
ファイル: Program.cs プロジェクト: sxmanton/adventofcode2017
        static void Main(string[] args)
        {
            var originalList = ListGenerator.MakeValueEqualsIndexList(256);

            var knotterPart1 = new ListKnotter <int>(originalList);
            var lengthsPart1 = LENGTHS_STRING.Split(',').Select(s => int.Parse(s)).ToList();
            var outputPart1  = knotterPart1.ApplyTwists(lengthsPart1, 1);

            var product = outputPart1[0] * outputPart1[1];

            Console.WriteLine("Product of first two values of twisted list for part 1: {0}", product);

            var outputPart2 = KnotHasher.Hash(LENGTHS_STRING);

            Console.WriteLine("Hashed value for part 2: {0}", outputPart2);

            Console.ReadLine();
        }
コード例 #2
0
        public static string Hash(string input)
        {
            var lengths = AsciiConverter.ConvertString(input);

            lengths.AddRange(APPENDED_LENGTH_SEQUENCE);

            var listToKnot = ListGenerator.MakeValueEqualsIndexList(256);

            var knotter    = new ListKnotter <int>(listToKnot);
            var sparseHash = knotter.ApplyTwists(lengths, 64);

            var denseHash = new List <int>();

            for (int i = 0; i < 16; i++)
            {
                var range      = sparseHash.GetRange(i * 16, 16);
                var denseValue = range.Aggregate((x, y) => x ^ y);
                denseHash.Add(denseValue);
            }

            var hash = denseHash.Aggregate("", (agg, next) => agg + next.ToString("X2"));

            return(hash.ToLower());
        }