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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. struct el
  5. {
  6. 	int a;
  7. 	int b;
  8. };
  9.  
  10. el nth_el(int n)
  11. {
  12. 	el ret;
  13. 	ret.a = ret.b = 0;
  14. 	for (int i = 1; i <= n; i++)
  15. 	{
  16. 		int c = ret.a;
  17. 		ret.a = ret.a + 2 * ret.b + 3;
  18. 		ret.b = c - ret.b - 1;
  19. 	}
  20. 	return ret;
  21. }
  22.  
  23. int main()
  24. {
  25. 	int n;
  26. 	while (cin >> n)
  27. 	{
  28. 		el r = nth_el(n);
  29. 		cout << r.a << " " << r.b << endl;
  30. 	}
  31. 	return 0;
  32. }
Success #stdin #stdout 0s 3144KB
comments (?)
stdin
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1
2
3
4
5
6
stdout
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3 -1
4 3
13 0
16 12
43 3
52 39
https://ideone.com/aXwmQW
language:
C++14 (gcc 8.3)
created:
9 years ago
visibility:
public

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