bdfz_2024_summer/test.cpp

#include <bits/stdc++.h>
using namespace std;
#define int long long 



signed main(){
    int b,e,m;
    #ifdef OITEST
    b=2;e=10;m=9;
    #endif
    #ifndef OITEST
    cin>>b>>e>>m;
    #endif
    
    int r=1;
    while(e>0){
        if (e%2==1) {
            r=(r*b)%m;
        }
        e=(e>>1);
        b=(b*b)%m;
    }
    cout<<r<<endl;
    #ifdef OITEST
    assert(r==7);
    #endif
}