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  1. #include <iostream> 
  2. using namespace std;
  3. int main() { 
  4.     long long n, m = 5, s = 0; 
  5.     cin >> n; 
  6.     while(n >= m){
  7.         s = s + (n / m); 
  8.         m = m * 5;
  9.     }
  10.     cout << s;
  11.     return 0;
  12. }
Success #stdin #stdout 0s 4524KB
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https://ideone.com/SGngWm
language:
C++ (gcc 8.3)
created:
4 years ago
visibility:
secret

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