Solved by seojunn

#	Title	# Solved	Avg. Tries
11720	숫자의 합 STANDARD	127,510	1.79
15552	빠른 A+B STANDARD	127,443	2.20
25083	새싹 STANDARD	70,918	1.89
27866	문자와 문자열 STANDARD	54,453	1.48
30802	Welcome Kit	7,303	1.85
31403	$A + B - C$	8,694	1.57

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