#include <bits/stdc++.h>
using namespace std;
int main (){
    long long a,b,ans;
    cin >> a >> b;
    ans = a;
    if(a == 1000000001){
		cout << "-1";
		return 0;
	}if(a == 1){
		cout << "1";
		return 0;
	}if(b == 1){
		cout << a;
		return 0;
	}if(a >= 31633){
		cout << "-1";
		return 0;
	}if(b >= 29){
		cout << "-1";
		return 0;
	}else{
		for(int i = 1;i < b;i++){
			ans = ans*a;
		}
		cout << ans;
		return 0;
	}
}
```cap
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