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#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
int main() {
freopen("pow.in", "r", stdin);
freopen("pow.out", "w", stdout);
LL a, b, res = 1;
cin >> a >> b;
//需要对a==1进行特判，否则肯定会TLE一个点,为啥呢？因为b的范围！它是<=1e9!如果a是1，会空跑1e9次！
if (a == 1) {
printf("%d\n", 1);
exit(0);
}
for (LL i = 1; i <= b; i++) {
res *= a;
if (res > 1e9) {
printf("%d\n", -1);
printf("%lld\n", res);
return 0;
