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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main() {
  5.  
  6. 	int n, a=1, b=1, c, ile=0;
  7. 	cin >> n;
  8.  
  9. 	if (n==1 || n==2)
  10. 		cout << ile << endl;
  11. 	else
  12. 	{
  13. 		for (int i=3; i<=n; i++)
  14. 		{
  15. 			c=a+b;
  16. 			if (c%2==0) ile++;
  17. 			a=b;
  18. 			b=c;
  19. 		}
  20. 		cout << ile << endl;
  21. 	}
  22.  
  23.  
  24.  
  25.  
  26. 	return 0;
  27. }
Success #stdin #stdout 0s 5244KB
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https://ideone.com/ag5uPb
language:
C++ (gcc 8.3)
created:
11 hours ago
visibility:
public

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