Solved by chegangang

#	Title	# Solved	Avg. Tries
1000	A+B STANDARD	325,840	2.59
1001	A-B STANDARD	280,110	1.45
1008	A/B STANDARD	231,492	2.90
1271	엄청난 부자2	23,467	2.86
1330	두 수 비교하기 STANDARD	204,653	2.01
2338	긴자리 계산	18,442	2.00
2420	Make a Difference STANDARD	31,531	2.16
2557	Hello World STANDARD	359,915	2.54

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