Day 06

Author: petertseng

06_mancala.rb

@@ -0,0 +1,11 @@
+input = (!ARGV.empty? && ARGV.all? { |a| a.match?(/^\d+$/) } ? ARGV : ARGF.read).split.map(&method(:Integer))
+
+seen = {input.dup.freeze => 0}
+puts 1.step { |n|
+  max = input.max
+  start = input.index(max)
+  input[start] = 0
+  max.times { |i| input[(start + 1 + i) % input.size] += 1 }
+  break [n, n - seen[input]] if seen.has_key?(input)
+  seen[input.dup.freeze] = n
+}