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  1. #include <iostream>
  2. #include<math.h>
  3. using namespace std;
  4.  
  5.  
  6. int main()
  7. {
  8. 	double n, num;
  9. 	cin >>n;
  10. 	int cnt = 1;
  11. 	num = n;
  12. 	while (num >= 0)
  13. 	{
  14. 		if (num == 1)
  15. 		{
  16. 			cout << cnt << '\n';
  17. 			return 0;
  18. 		}
  19. 		num -= 6 * cnt;
  20. 		cnt++;
  21. 	}
  22. 	if (fmod(n,6) == 0) cnt--;
  23. 	cout << cnt << '\n';
  24. 	return 0;
  25. }
Success #stdin #stdout 0.01s 5424KB
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https://ideone.com/jlTjKq
language:
C++14 (gcc 8.3)
created:
1 year ago
visibility:
public

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