aoc 1+2

www/statics/aoc/2018/11_solution-1.linq

@@ -0,0 +1,20 @@
+<Query Kind="Program" />
+
+public int serial_num;
+
+void Main()
+{
+	serial_num = int.Parse(File.ReadAllText(Path.Combine(Path.GetDirectoryName(Util.CurrentQueryPath), @"11_input.txt")));
+
+	Enumerable
+		.Range(1, 300-3)
+		.SelectMany(x => Enumerable.Range(1, 300-3).Select(y => new {X=x, Y=y, Pow=SPow(x, y) }))
+		.OrderByDescending(p => p.Pow)
+		.Select(p => $"{p.X},{p.Y}")
+		.First()
+		.Dump();
+}
+
+int Pow(int x, int y) => (((x + 10) * ((x + 10) * y + serial_num) / 100) % 10) - 5;
+
+int SPow(int x, int y) => Enumerable.Range(0, 9).Sum(v => Pow(x+v%3, y+v/3));