Solved by kmj980521

#	Title	# Solved	Avg. Tries
5719	Almost Shortest Path	3,677	5.11
11438	LCA 2	7,040	3.04
17435	합성함수와 쿼리	2,176	1.92
20176	Needle	421	1.42
23567	Double Rainbow	304	2.54
23571	John’s Gift	99	3.79

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