Solved by isnghyeng

#	Title	# Solved	Avg. Tries
15649	N과 M (1) STANDARD	50,206	1.58
15650	N과 M (2) STANDARD	46,644	1.35
15651	N과 M (3) STANDARD	38,336	1.50
15652	N과 M (4) STANDARD	39,270	1.27
18870	좌표 압축	34,372	2.52

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