Solved by chosd1123

#	Title	# Solved	Avg. Tries
14681	Quadrant Selection STANDARD	152,505	1.64
15552	빠른 A+B STANDARD	126,013	2.20
15829	Hashing	18,103	3.31
15964	이상한 기호 STANDARD	17,809	1.80
25083	새싹 STANDARD	69,623	1.89
27866	문자와 문자열 STANDARD	52,660	1.48
30802	Welcome Kit	6,414	1.84
31403	$A + B - C$	7,706	1.56

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