Solved by mg1135

#	Title	# Solved	Avg. Tries
10871	X보다 작은 수 STANDARD	150,039	1.84
10813	공 바꾸기	43,574	1.57
10807	개수 세기 STANDARD	77,437	1.61
5597	Who have not handed in ?	63,102	1.94
2738	행렬 덧셈	45,552	1.88
2557	Hello World STANDARD	347,071	2.54

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