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http://poj.org/problem?id=2531 刚开始题意理解错了,看题解也没看懂。 The traffic data are given in the form of matrix C, where Cij is the amount of data sent between ith 阅读全文
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http://codeforces.com/group/5pcxnzwAHv/contest/140/problem/A A. New Year Table time limit per test 2 seconds memory limit per test 256 megabytes input 阅读全文
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Christmas is coming and everyone is building a Christmas tree, and you are no exception. However you are special and you want to build a special one. 阅读全文
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A sequence of positive rational numbers is defined as follows:An infinite full binary tree labeled by positive rational numbers is defined by: The la 阅读全文