Solved by hamund2020

#	Title	# Solved	Avg. Tries
2557	Hello World STANDARD	363,564	2.54
5597	Who have not handed in ?	70,451	1.94
10807	개수 세기 STANDARD	86,570	1.62
10871	X보다 작은 수 STANDARD	158,595	1.84

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