1. poj 1995  Raising Modulo Numbers 2.链接:http://poj.org/problem?id=1995 3.总结:今天七夕,来发水题纪念一下...入ACM这个坑也快一年了 题意:求ai^bi和模m.裸快速幂 #include<iostream> #include<cstring> #include<cmath> #include<queue> #include<algorithm> #include<…

http://poj.org/problem?id=1995 简单的快速幂问题 要注意num每次加过以后也要取余,否则会出问题 #include<iostream> #include<cstdio> using namespace std; typedef long long ll; ll mod_pow(ll x,ll n,ll mod) { ll res=; ) { ) res=res*x%mod; x=x*x%mod; n>>=; } return res; }…

http://poj.org/problem?id=1995 以这道题来分析一下快速幂取模 a^b%c(这就是著名的RSA公钥的加密方法),当a,b很大时,直接求解这个问题不太可能 利用公式a*b%c=((a%c)*b)%c 每一步都进行这种处理,这就解决了a^b可能太大存不下的问题,但这个算法的时间复杂度依然没有得到优化 由此可以用快速幂算法优化: http://www.cnblogs.com/qlky/p/5020402.html 再结合取模公式: (a + b) % p = (a % p…

[题目链接] http://poj.org/problem?id=1995 [算法] 快速幂 [代码] #include <algorithm> #include <bitset> #include <cctype> #include <cerrno> #include <clocale> #include <cmath> #include <complex> #include <cstdio> #includ…

题目链接:http://poj.org/problem?id=1995 解题思路:用整数快速幂算法算出每一个 Ai^Bi,然后依次相加取模即可. #include<stdio.h> long long quick_mod(long long a,long long b,long long c) { long long ans=1; while(b) { if(b&1) { ans=ans*a%c; } b>>=1; a=a*a%c; } return ans; } int…

嗯... 题目链接:http://poj.org/problem?id=1995 快速幂模板... AC代码: #include<cstdio> #include<iostream> using namespace std; int main(){ ; scanf("%lld", &N); while(N--){ scanf("%lld%lld", &M, &n); sum = ; ; i <= n; i++){…

阶乘总和 题目大意:要你算一堆阶乘对m的模... 大水题,对指数二分就可以了... #include <iostream> #include <functional> #include <algorithm> using namespace std; typedef long long LL_INT; LL_INT cal(const LL_INT, const LL_INT, const LL_INT); int main(void) { int case_sum,…

#include <iostream> using namespace std; long long power(long long a, long long b, long long m); int main() { //freopen("acm.acm","r",stdin); int test; long long sum; long long a; long long b; long long m; long long n; int i; cin…

Raising Modulo Numbers Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 5477   Accepted: 3173 Description People are different. Some secretly read magazines full of interesting girls' pictures, others create an A-bomb in their cellar, oth…

Raising Modulo Numbers Time Limit: 1000MS   Memory Limit: 30000K Total Submissions: 5934   Accepted: 3461 Description People are different. Some secretly read magazines full of interesting girls' pictures, others create an A-bomb in their cellar, oth…