Solved by wls94kr

#	Title	# Solved	Avg. Tries
15651	N과 M (3) STANDARD	38,866	1.49
15650	N과 M (2) STANDARD	47,355	1.35
15649	N과 M (1) STANDARD	50,889	1.58
10974	모든 순열	16,378	1.51

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