Solved by changukim

#	Title	# Solved	Avg. Tries
15652	N과 M (4) STANDARD	36,477	1.27
15651	N과 M (3) STANDARD	35,958	1.49
15650	N과 M (2) STANDARD	43,362	1.35
15649	N과 M (1) STANDARD	46,926	1.58

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