Solved by dongdong40

#	Title	# Solved	Avg. Tries
2438	별 찍기 - 1 STANDARD	189,330	1.61
2558	A+B - 2 STANDARD	77,318	1.39
9498	시험 성적 STANDARD	209,865	1.82
10869	사칙연산 STANDARD	233,106	2.24
27866	문자와 문자열 STANDARD	61,242	1.48
31403	$A + B - C$	12,296	1.59

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