题解

#include<bits/stdc++.h>
using namespace std;
long hhh(int a1,int b1){
    long long m=pow(a1,b1);
    if(b1==0)return 1;
    if(m%7==0)return 7;
    if(a1==9)return m%7-1;
    return m%7;
}
int main(){
    int a,b;
    cin>>a>>b;
    cout<<hhh(a,b)<<endl;
    return 0;
}