#include<bits/stdc++.h>
using namespace std;
int main (){
	long long num = 1,a,b;
	scanf("%d%d",&a,&b);
	for (int i = 1;i <= b;i++){
		num *= a;
		if(num > 1000000000)
		{
			cout<<-1;
			return 0;
		}
	}
	cout<<num;
}

求助，为啥不能用SCANF输入，用CIN才行