题解

#include <bits/stdc++.h>
using namespace std;
int f(long long x){  //注意a的b次方的大小
    if((7+x)%7==0)return 7;
    return (7+x)%7; 
}
int main(){
    int a,b;
    cin>>a>>b;
    cout<<f(pow(a,b));
    return 0;
}

AC