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Mooncake is a Chinese bakery product traditionally eaten during the Mid-Autumn Festival. Many types of fillings and crusts can be found in traditional 阅读全文
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For any 4-digit integer except the ones with all the digits being the same, if we sort the digits in non-increasing order first, and then in non-decre 阅读全文
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Given two sets of integers, the similarity of the sets is defined to be /, where Nc is the number of distinct common numbers shared by the two sets 阅读全文
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Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Each test is supposed to run sim 阅读全文
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Forbes magazine publishes every year its list of billionaires based on the annual ranking of the world's wealthiest people. Now you are supposed to si 阅读全文
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Eva loves to collect coins from all over the universe, including some other planets like Mars. One day she visited a universal shopping mall which cou 阅读全文
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Excel can sort records according to any column. Now you are supposed to imitate this function. Input Specification: Each input file contains one test 阅读全文
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树是一种重要的非线性数据结构，在计算机科学中有着十分广泛的应用，具有层次性和分支性，我这次仅仅介绍一些二叉树的性质和写法 二叉树是树的特殊一种，具有如下特点：1、每个结点最多有两颗子树，结点的度最大为2。2、左子树和右子树是有顺序的，次序不能颠倒。3、即使某结点只有一个子树，也要区分左右子树。 阅读全文
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在我们求一些递推式子是，如果一味的使用for可能在数据很大的时候就超时，所以引入矩阵快速幂 将递推关系隐藏在初始矩阵中，然后使用矩阵快速幂降低时间，就可求出 https://www.luogu.org/problem/P3390 /* Name: Copyright: Author: 流照君 Dat 阅读全文