rt，样例都过不了还AC了

#include<bits/stdc++.h>
using namespace std;
int main()
{
    unsigned long long a,b;
    cin>>a>>b;
    unsigned long long p=pow(a,b);
    if(p<=pow(10,9)) cout<<p<<endl;
    else cout<<"-1"<<endl;
    return 0;
}