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线段树基础操作 阅读全文
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Problem Description有N个比赛队（1<=N<=500），编号依次为1，2，3，。。。。，N进行比赛，比赛结束后，裁判委员会要将所有参赛队伍从前往后依次排名，但现在裁判委员会不能直接获得每个队的比赛成绩，只知道每场比赛的结果，即P1赢P2，用P1，P2表示，排名时P1在P2之前。现在 阅读全文
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Anna and Maria are in charge of the math club for junior students. When the club gathers together, the students behave badly. They've brought lots of 阅读全文
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Problem Description Consider a un-rooted tree T which is not the biological significance of tree or plant, but a tree as an undirected graph in graph 阅读全文
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There are N different kinds of transport ships on the port. The ith kind of ship can carry the weight of V[i]V[i] and the number of the ith kind of sh 阅读全文
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There are N children in kindergarten. Miss Li bought them N candies. To make the process more interesting, Miss Li comes up with the rule: All the chi 阅读全文
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You are given positive integer number n. You should create such strictly increasingsequence of k positive numbers a1, a2, ..., ak, that their sum is e 阅读全文
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描述 Given an N*N matrix, find the coolest square sub-matrix.We define the cool value of the square matrix as X-Y where X indicating the sum of all inte 阅读全文
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Sheila is a student and she drives a typical student car: it is old, slow, rusty, and falling apart. Recently, the needle on the speedometer fell off. 阅读全文
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描述 Given an N-digit number, you should remove K digits and make the new integer as large as possible. Given an N-digit number, you should remove K dig 阅读全文
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描述 In this problem, `lattice points' in the plane are points with integer coordinates. In order to contain his cows, Farmer John constructs a triangul 阅读全文
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Alice, a student of grade 6, is thinking about an Olympian Math problem, but she feels so despair that she cries. And her classmate, Bob, has no idea 阅读全文
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基础素数测试模板 对于大数的素性判断，目前Miller-Rabin算法应用最广泛。一般底数仍然是随机选取，但当待测数不太大时，选择测试底数就有一些技巧了。比如，如果 被测数小于4759123141，那么只需要测试三个底数 a[]={2,7,61} 就足够了。当然，测试的越多，正确的范围也越大。如果你 阅读全文
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tarjan求强连通分量 阅读全文
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Problem Description people in USSS love math very much, and there is a famous math problem . give you two integers n,a,you are required to find 2 inte 阅读全文