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Emily the entrepreneur has a cool business idea: packaging and selling snowflakes. She has devised a machine that captures snowflakes as they fall, an 阅读全文
posted @ 2017-08-02 15:43
山杉三
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You are one of the competitors of the Olympiad in numbers. The problem of this year relates to beatiful numbers. One integer is called beautiful if an 阅读全文
posted @ 2017-08-02 10:05
山杉三
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新年快到了，“猪头帮协会”准备搞一个聚会，已经知道现有会员N人，把会员从1到N编号，其中会长的号码是N号，凡是和会长是老朋友的，那么该会员的号码肯定和N有大于1的公约数，否则都是新朋友，现在会长想知道究竟有几个新朋友？请你编程序帮会长计算出来。 Input第一行是测试数据的组数CN（Case num 阅读全文
posted @ 2017-08-02 09:12
山杉三
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