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  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int main(void)
  6. {
  7. 	int n;
  8. 	cin >> n;
  9.  
  10. 	int cnt = 0;		//5로 나누는 경우
  11.  
  12. 	for (int i = 2; i <= n; i++)
  13. 	{
  14. 		int temp = i;		//i의 값 임시 저장
  15. 		while (temp % 5 == 0)	//5로 나눌 수 없을 때까지 반복
  16. 		{
  17. 			temp /= 5;
  18. 			cnt++;
  19. 		}
  20. 	}
  21. 	cout << cnt;
  22. }
Success #stdin #stdout 0s 5492KB
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https://ideone.com/4AwzDH
language:
C++ (gcc 8.3)
created:
3 years ago
visibility:
public

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