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4360
WA
WA
leeyouna01
Reply 5 years 1 week ago
왜 WA일까요 ㅠㅠ,,, sample input/output은 잘 나오는데 : "3 4388576018402626 Invalid 4388576018410707 Valid 4388576018402626 Invalid " 어디서 틀렷는지 몰르겠어요,,,
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withcs2
Reply 5 years 1 week ago
문제를 잘 읽어보세요. 조건이 더 있습니다. ■ 4 for Visa cards ■ 5 for Master cards ■ 37 for American Express cards ■ 6 for Discover cards