Solved by chegangang

#	Title	# Solved	Avg. Tries
1000	A+B STANDARD	302,591	2.57
1001	A-B STANDARD	259,434	1.44
1008	A/B STANDARD	212,858	2.90
1271	엄청난 부자2	20,790	2.88
1330	두 수 비교하기 STANDARD	187,387	2.01
2338	긴자리 계산	16,284	1.99
2420	Make a Difference STANDARD	27,277	2.17
2557	Hello World STANDARD	335,281	2.54

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