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  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int fun(int n) {
  5.  
  6.     int x=1, k;
  7.     if (n==1) return x;
  8.     for (k=1; k<n; ++k)
  9.         x = x + fun(k) *fun (n-k);
  10.     return x;
  11. }
  12.  
  13. int main() {
  14. 	cout<<fun(5);
  15. 	return 0;
  16. }
Success #stdin #stdout 0s 3096KB
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https://ideone.com/wrLiLm
language:
C++ (gcc 8.3)
created:
9 years ago
visibility:
public

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