Solved by dhkd7600

#	Title	# Solved	Avg. Tries
2753	윤년 STANDARD	181,424	1.94
10699	오늘 날짜 STANDARD	35,908	1.84
10869	사칙연산 STANDARD	226,598	2.23
11382	꼬마 정민 STANDARD	89,544	2.48

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