Raising Modulo Numbers POJ - 1995

Posted 2020-12-24 hdsdogge

入门的快速幂 要注意的是x^p的范围没给 用int会爆 最保险的 还是用long long

/*  
 author:hdsdogge  
 begin:  
 end:  
 cost:  
 */
#include<iostream>
#include<string>
#include<queue>
#include<map>
#include<stack>
#include<algorithm>
#include<cmath>
#include<cstdio>
#include<cstring>
#include<vector>
#include<bitset>
#include<cstdlib>
#include<list>
#include <sstream>
#include<ctype.h>
using namespace std;
const int maxn=100+10;
typedef pair<int,int> P;
typedef long long ll;
const double PI = acos(-1.0);
const double eps = 1e-6;
const int INF = 1000000000;
int T,n,m,M;
ll a,b;
int main() {
    //freopen("test","r",stdin);
    //freopen("out","w",stdout);
    std::ios::sync_with_stdio(false);
    std::cin.tie(0);
    cin>>T;
    while(T--){
        cin>>M;
        cin>>n;
        ll sum=0;
        for(int i=0;i<n;i++){
            cin>>a>>b;
            ll x=a;
            ll p=b;
            ll ans=1;
            while(p>0){
                if(p&1) ans=ans*x%M;
                x=x*x%M;
                p>>=1;
            }
            sum+=ans;
        }
        cout<<sum%M<<endl;
    }
    return 0;
}