Solved by changukim

#	Title	# Solved	Avg. Tries
15652	N과 M (4) STANDARD	39,872	1.27
15651	N과 M (3) STANDARD	38,871	1.49
15650	N과 M (2) STANDARD	47,363	1.35
15649	N과 M (1) STANDARD	50,898	1.58

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