17 lines
235 B
C++
17 lines
235 B
C++
#include <bits/stdc++.h>
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using namespace std;
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int jieCheng(int n) {
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if (n == 1) return 1;
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return n * jieCheng(n - 1);
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}
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int main() {
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int n;
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cin >> n;
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cout << jieCheng(n) << endl;
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return 0;
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}
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