Solved by gosoj

#	Title	# Solved	Avg. Tries
11720	숫자의 합 STANDARD	129,745	1.79
11726	2×n 타일링	55,595	2.71
15829	Hashing	19,170	3.33
25083	새싹 STANDARD	72,753	1.89
27866	문자와 문자열 STANDARD	57,028	1.48
30802	Welcome Kit	8,543	1.86
31403	$A + B - C$	10,033	1.58

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