Solved by devonic

#	Title	# Solved	Avg. Tries
11723	집합	30,623	3.39
14681	Quadrant Selection STANDARD	161,440	1.64
15596	정수 N개의 합	61,968	1.98
18258	큐 2	31,590	3.03
18870	좌표 압축	37,025	2.50

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