Solved by dhkd7600

#	Title	# Solved	Avg. Tries
2753	윤년 STANDARD	176,531	1.93
10699	오늘 날짜 STANDARD	34,396	1.84
10869	사칙연산 STANDARD	221,123	2.23
11382	꼬마 정민 STANDARD	84,615	2.47

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