aoc 1+2

www/statics/aoc/2018/09_solution-2.linq

@@ -0,0 +1,55 @@
+<Query Kind="Program" />
+
+class Marble { public Marble Prev, Next; public int Value; }
+
+void Main()
+{
+	var input = File.ReadAllText(Path.Combine(Path.GetDirectoryName(Util.CurrentQueryPath), @"09_input.txt"));
+
+	var players = int.Parse(input.Split(' ')[0]);
+	var marbles = int.Parse(input.Split(' ')[6]) * 100;
+
+	List<int> board = new List<int> { 0 };
+	long[] score = new long[players];
+
+	Marble curr = new Marble();
+	curr.Next = curr;
+	curr.Prev = curr;
+
+	int currplayer = 0;
+	Marble old = null;
+	for (int m = 1; m <= marbles; m++)
+	{
+		if (m % 23 != 0)
+		{
+			curr = curr.Next;
+			var nm = old ?? new Marble();
+			old=null;
+			nm.Prev=curr;
+			nm.Next=curr.Next;
+			nm.Value=m;
+			curr.Next.Prev = nm;
+			curr.Next = nm;
+			curr = curr.Next;
+		}
+		else
+		{
+			score[currplayer] += m;
+			curr = curr.Prev.Prev.Prev.Prev.Prev.Prev;
+			score[currplayer] += curr.Prev.Value;
+			
+			old = curr.Prev;
+			var c = old.Prev;
+			c.Next = curr;
+			curr.Prev=c;
+		}
+
+		//($"[{currplayer+1:0}]" + string.Join(" ", board.Select((b, i) => i == curr ? $"({b:00})" : $" {b:00} "))).Dump();
+
+		currplayer = (currplayer + 1) % players;
+
+		Util.Progress = (m * 100) / marbles;
+	}
+
+	score.Max().Dump();
+}