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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. unsigned long long factorial(int n) {
  5.     unsigned long long result = 1;
  6.     for (int i = 2; i <= n; i++) {
  7.         result *= i;
  8.     }
  9.     return result;
  10. }
  11.  
  12. int main() {
  13.     int n;
  14.     cin >> n;
  15.     cout << factorial(n) << endl;
  16.     return 0;
  17. }
Success #stdin #stdout 0s 5320KB
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stdin 
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stdout 
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https://ideone.com/0Bs2GV
language:
C++ (gcc 8.3)
created:
2 days ago
visibility:
public

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