这题要开freopen！！！

#include <bits/stdc++.h>
using namespace std;
int main()
{
    freopen("pow.in","r",stdin);
    freopen("pow.out","w",stdout);
    int max = pow(10,9);
    long long sum = 1;
    long long a,b;
    cin>>a>>b;
    for (int i = 1;i <= b;i++)
    {
        sum *= a;
        if (sum > max)
        {
            cout<<-1;
            return 0;
        }
    }
    if (sum == 0)
    {
        cout<<-1;
        return 0;
    }
    cout<<sum;
    return 0;
}