Solved by dhkd7600

#	Title	# Solved	Avg. Tries
2753	윤년 STANDARD	178,761	1.93
10699	오늘 날짜 STANDARD	35,052	1.85
10869	사칙연산 STANDARD	223,509	2.23
11382	꼬마 정민 STANDARD	86,748	2.48

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