Solved by gosoj

#	Title	# Solved	Avg. Tries
11720	숫자의 합 STANDARD	126,318	1.78
11726	2×n 타일링	53,966	2.72
15829	Hashing	18,190	3.31
25083	새싹 STANDARD	69,879	1.89
27866	문자와 문자열 STANDARD	53,071	1.48
30802	Welcome Kit	6,595	1.84
31403	$A + B - C$	7,923	1.57

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