Solved by wls94kr

#	Title	# Solved	Avg. Tries
10974	모든 순열	16,912	1.50
15649	N과 M (1) STANDARD	53,067	1.58
15650	N과 M (2) STANDARD	49,691	1.35
15651	N과 M (3) STANDARD	40,501	1.50

1