aoc 1+2

www/statics/aoc/2018/14_solution-2.linq

@@ -0,0 +1,33 @@
+<Query Kind="Statements" />
+
+var input = File.ReadAllText(Path.Combine(Path.GetDirectoryName(Util.CurrentQueryPath), @"14_input.txt")).Select(c => c-'0').Reverse().ToArray();
+
+
+var board = new List<short>();
+board.Add(3);
+board.Add(7);
+
+int elf1 = 0;
+int elf2 = 1;
+for (int gen = 0; ; gen++)
+{
+	var sum1 = board[elf1] + board[elf2];
+	if (sum1 >= 10) board.Add(1); board.Add((short)(sum1 % 10));
+
+	elf1 = (elf1 + 1 + board[elf1]) % board.Count;
+	elf2 = (elf2 + 1 + board[elf2]) % board.Count;
+
+	//board.Select((p, i) => (i == elf1) ? $"({p})" : ((i == elf2) ? $"[{p}]" : $" {p} ")).Aggregate((a,b)=>a+" "+b).Dump();
+
+	if (board.Count >= input.Length && input.Select((p,i) => board[board.Count-1-i]==p  ).All(p=>p))
+	{
+		(board.Count-input.Length).Dump();
+		return;
+	}
+
+	if (board.Count >= input.Length && sum1 >= 10 && input.Select((p, i) => board[board.Count - 2 - i] == p).All(p => p))
+	{
+		(board.Count - input.Length - 1).Dump();
+		return;
+	}
+}