Solved by alswl2487

#	Title	# Solved	Avg. Tries
15649	N과 M (1) STANDARD	53,262	1.58
15650	N과 M (2) STANDARD	49,893	1.35
15651	N과 M (3) STANDARD	40,635	1.50
15652	N과 M (4) STANDARD	41,989	1.27

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