[CSP-J 2022] 乘方

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