Solved by pyb0987

#	Title	# Solved	Avg. Tries
15650	N과 M (2) STANDARD	46,378	1.35
15651	N과 M (3) STANDARD	38,109	1.49
15652	N과 M (4) STANDARD	39,043	1.27
18870	좌표 압축	34,106	2.52

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