Solved by jihooshim

#	Title	# Solved	Avg. Tries
10869	사칙연산 STANDARD	224,057	2.23
2557	Hello World STANDARD	350,315	2.54
1008	A/B STANDARD	224,188	2.90
1001	A-B STANDARD	272,084	1.44
1000	A+B STANDARD	316,860	2.58

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