Solved by horolrolro9

#	Title	# Solved	Avg. Tries
27433	팩토리얼 2	15,646	2.09
27866	문자와 문자열 STANDARD	55,637	1.48
28278	스택 2	12,615	2.72
28279	덱 2	7,296	2.01
31403	$A + B - C$	9,269	1.58

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