Solved by friends_c

#	Title	# Solved	Avg. Tries
11720	숫자의 합 STANDARD	133,622	1.78
14681	Quadrant Selection STANDARD	161,362	1.64
15552	빠른 A+B STANDARD	132,993	2.20
15829	Hashing	20,360	3.33
18108	1998년생인 내가 태국에서는 2541년생?!	131,367	1.57

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