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  1. #include <iostream>
  2. #include <string>
  3. using namespace std;
  4.  
  5. int f(int x, int y)
  6. {
  7.   if (x <= 0) {
  8.      return y;
  9.   }
  10.   return f(x - 1, y + 1) - f(x / 2, y * 2);
  11. }
  12.  
  13. int main()
  14. {
  15. 	cout << "answer: " << f(4, -1);
  16. 	return 0;
  17. }
Success #stdin #stdout 0s 4380KB
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stdin
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Standard input is empty
stdout
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answer: 2
https://ideone.com/Or2bRy
language:
C++ (gcc 8.3)
created:
5 years ago
visibility:
public

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