Solved by chegangang

#	Title	# Solved	Avg. Tries
1000	A+B STANDARD	325,082	2.59
1001	A-B STANDARD	279,455	1.45
1008	A/B STANDARD	230,853	2.90
1271	엄청난 부자2	23,371	2.86
1330	두 수 비교하기 STANDARD	204,061	2.01
2338	긴자리 계산	18,342	2.00
2420	Make a Difference STANDARD	31,356	2.16
2557	Hello World STANDARD	359,133	2.54

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