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Problem DescriptionFind and list all four-digit numbers in decimal notation that have the property that the sum of its four digits equals the sum of i... 阅读全文
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Problem DescriptionIn the new year party, everybody will get a "special present".Now it's your turn to get your special present, a lot of presents now... 阅读全文
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Problem Descriptionmmm is learning division, she's so proud of herself that she can figure out the sum of all the divisors of numbers no larger than 1... 阅读全文
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Problem DescriptionThere must be many A + B problems in our HDOJ , now a new one is coming.Give you two hexadecimal integers , your task is to calcula... 阅读全文
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Problem Description最后的挑战终于到了！站在yifenfei和MM面前的只剩下邪恶的大魔王lemon一人了！战胜他，yifenfei就能顺利救出MM。Yifenfei和魔王lemon的挑战很简单：由lemon给出三个字符串，然后要yifenfei说出第一串的某个子串，要求该子串长度... 阅读全文
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Problem Description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... 阅读全文