Solved by cheongsan16

#	Title	# Solved	Avg. Tries
2557	Hello World STANDARD	335,602	2.54
10757	큰 수 A+B STANDARD	41,940	2.00
10869	사칙연산 STANDARD	212,934	2.22
13410	거꾸로 구구단	2,622	1.61

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