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#include <bits/stdc++.h>
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using namespace std;
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typedef long long LL;
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int main() {
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int a, b;
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cin >> a >> b;
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LL res = 1;
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while (a > 1 && b--) {
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res *= a;
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if (res > 1e9) {
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res = -1;
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break;
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}
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}
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cout << res << endl;
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return 0;
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} |
