Solved by ctgcsh9600

#	Title	# Solved	Avg. Tries
1890	Jump The Board!	13,168	3.21
9012	Parenthesis	77,879	2.16
14888	연산자 끼워넣기	35,261	2.13
15552	빠른 A+B STANDARD	127,281	2.20

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