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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. unsigned long long int f(int n)
  5. {
  6.     if(n == 0) return 0;
  7.     if(n == 1 || n == 2) return 1;
  8.  
  9.     return f(n-1)+f(n-2);
  10. }
  11.  
  12. int main()
  13. {
  14.     cout << f(10) << endl;
  15.     return 0;
  16. }
Success #stdin #stdout 0s 15240KB
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https://ideone.com/vBXnj5
language:
C++ (gcc 8.3)
created:
6 years ago
visibility:
public

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