Solved by developsm

#	Title	# Solved	Avg. Tries
27323	직사각형	23,463	1.15
27866	문자와 문자열 STANDARD	59,269	1.48
28278	스택 2	13,705	2.70
28279	덱 2	7,976	2.00
31403	$A + B - C$	11,123	1.59

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