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  1. #include <string>
  2. #include <iostream>
  3.  
  4. using namespace std;
  5.  
  6.  
  7. int main(void) {
  8. 	int a, i = 0, sum = 0 ;
  9. 	cin >> a;
  10. 	if (a != 1) {
  11. 		while (a - sum > 0) {
  12. 			i++;
  13. 			sum += 6 * i;
  14. 		}
  15. 	cout << i + 1;
  16. 	}
  17. 	else {
  18. 		cout << 1;
  19. 	}
  20. }
  21.  
  22.  
Success #stdin #stdout 0.01s 5360KB
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https://ideone.com/0cWlwx
language:
C++ (gcc 8.3)
created:
1 year ago
visibility:
public

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