userluoxuan的专栏

Description Given a n × n matrix A and a positive integer k, find the sum S = A + A2 + A3 + … + Ak. Input The input contains exactly one test case. The first line of input con

解题思路： 最水的乘法逆元题

解题思路： 设走了s步，则

解题思路： 题目大意是给几个洞，狼从第1个

Description The branch of mathematics called number theory is about properties of numbers. One of the areas that has captured the interest of number theoreticians for thousands of years is the qu

互质版： #include #include #include using namespace std; typedef __int64 int64; int64 a[15],b[15]; int64 Extend_Euclid(int64 a, int64 b, int64&x, int64& y) { if(b==0) {

解题思路： 筛选法求素数模板题，

Description Bob and Alice started to use a brand-new encoding scheme. Surprisingly it is not a Public Key Cryptosystem, but their encoding and decoding is based on secret keys. They chose the sec