Solved by whds0524

#	Title	# Solved	Avg. Tries
2557	Hello World STANDARD	346,953	2.54
7287	Registration STANDARD	60,714	1.92
10171	Cats STANDARD	179,525	2.81
10699	오늘 날짜 STANDARD	34,528	1.84
10869	사칙연산 STANDARD	221,563	2.23
11382	꼬마 정민 STANDARD	85,007	2.47

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