c++ 如何开N次方?速解 直接上代码 #include <iostream> #include <cmath> using namespace std; typedef long long LL; int main() { LL a = 625; LL s = pow(a,1.0/4); cout<<"pow开方:"<<s<<endl; return 0; } 说明一下: pow中的第二个参数必须是1.0 / N,或者 …
RSA加密算法是最常用的非对称加密算法,CFCA在证书服务中离不了它.但是有不少新来的同事对它不太了解,恰好看到一本书中作者用实例对它进行了简化 而生动的描述,使得高深的数学理论能够被容易地理解.我们经过整理和改写特别推荐给大家阅读,希望能够对时间紧张但是又想了解它的同事有所帮助. RSA是第一个比较完善的公开密钥算法,它既能用于加密,也能用于数字签名.RSA以它的三个发明者Ron Rivest, Adi Shamir, Leonard Adleman的名字首字母命名,这个算法经受住了多年深入的…
Lexicography Time Limit:1000MS Memory Limit:131072KB 64bit IO Format:%lld & %llu Submit Status Practice CSU 1563 Description An anagram of a string is any string that can be formed using the same letters as the original. (We consider the orig…
Joseph Time Limit: 1 Sec Memory Limit: 64 MB Submit: 493 Solved: 311 Description The Joseph's problem is notoriously known. For those who are not familiar with the original problem: from among n people, numbered 1, 2, . . ., n, standing in circle e…
zhx's contest Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Total Submission(s): 851 Accepted Submission(s): 282 Problem Description As one of the most powerful brushes, zhx is required to give his juniors n p…