老师眼中的魔术

#include<bits/stdc++.h>
using namespace std;
    int a,b,p;
    int quick_pow(int a,int b,int md){
        int res=1;
        while(b){
            if(b%2==1)
                res=(long long)res*a%md;
            b/=2;
            a=(long long)a*a%md;
        }
        return res%md;
    }
int main()
{
    cin>>a>>b>>p;
    cout<<quick_pow(a,b,p);
    return 0;
}