Solved by cheongsan16

#	Title	# Solved	Avg. Tries
2557	Hello World STANDARD	356,155	2.54
10757	큰 수 A+B STANDARD	43,707	1.98
10869	사칙연산 STANDARD	228,297	2.24
13410	거꾸로 구구단	2,833	1.61

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