Solved by whds0524

#	Title	# Solved	Avg. Tries
2557	Hello World STANDARD	350,392	2.54
7287	Registration STANDARD	61,357	1.92
10171	Cats STANDARD	181,349	2.81
10699	오늘 날짜 STANDARD	35,202	1.85
10869	사칙연산 STANDARD	224,098	2.23
11382	꼬마 정민 STANDARD	87,286	2.48

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