求hack 民间最后一个炸了（）

#include <iostream>
#include <cmath>
using namespace std;
const int num = 1e9;
int a, b;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0); cout.tie(0);
    cin >> a >> b;
    double ans = log(1e9) / log(a);
    if (ans <= b || a > num) {
        cout << -1 << endl;
    } else {
        cout << (long long)pow(a, b) << endl;
    }
    return 0;
}