Solved by blueghost

#	Title	# Solved	Avg. Tries
14681	Quadrant Selection STANDARD	158,468	1.64
15552	빠른 A+B STANDARD	130,651	2.20
25083	새싹 STANDARD	73,851	1.89
27866	문자와 문자열 STANDARD	58,465	1.48
30802	Welcome Kit	9,226	1.87
31403	$A + B - C$	10,785	1.59

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