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Like everyone else, cows like to stand close to their friends when queuing for feed. FJ has N (2 <= N <= 1,000) cows numbered 1..N standing along a st 阅读全文
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You are given an array aa consisting of nn integers. Your task is to say the number of such positive integers xx such that xx divides each number from 阅读全文
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On Octorber 21st, HDU 50-year-celebration, 50-color balloons floating around the campus, it's so nice, isn't it? To celebrate this meaningful day, the 阅读全文
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2019中国大学生程序设计竞赛(CCPC) - 网络选拔赛 A - ^&^ Bit operation is a common computing method in computer science ,Now we have two positive integers Aand B ,Please 阅读全文