突发奇想

#include<iostream>
#include<cstdio>
#include<algorithm>
#include<cmath>

using namespace std;

int main(){
    int sum,a,b;
    cin>>a>>b;
    if( (sum=pow(a,b))<=0 )
        cout<<-1;
    else    cout<<sum;
    return 0;
}