Solved by kmj980521

#	Title	# Solved	Avg. Tries
5719	Almost Shortest Path	3,851	5.09
11438	LCA 2	7,327	3.04
17435	합성함수와 쿼리	2,318	1.92
20176	Needle	439	1.40
23567	Double Rainbow	317	2.50
23571	John’s Gift	106	3.98

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