Solved by ghals05

#	Title	# Solved	Avg. Tries
17829	222-풀링	2,386	1.32
18870	좌표 압축	35,658	2.51
19532	수학은 비대면강의입니다	21,177	1.96
23240	Colorful Tower of Hanoi	99	2.61

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