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15 lines
229 B
C++
15 lines
229 B
C++
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// R38740581
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#include<bits/stdc++.h>
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using namespace std;
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int ans[13] = {0, 1, 2, 6, 24, 120, 720, 5040, 40320, 362880, 3628800, 39916800, 479001600};
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int main() {
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int n;
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cin >> n;
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cout << ans[n];
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return 0;
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}
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