Solved by wta5824

#	Title	# Solved	Avg. Tries
2588	곱셈 STANDARD	159,890	2.14
2753	윤년 STANDARD	170,744	1.93
10807	개수 세기 STANDARD	72,031	1.61
15552	빠른 A+B STANDARD	121,730	2.20

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