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  1. #include<iostream>
  2. #include <algorithm>
  3.  
  4. int count=0,cache[50];
  5.  
  6. int f(int n)
  7. {  
  8.     if(n==2) count++;
  9.     if(n==0 || n==1) return n;
  10.     else if(cache[n]!=-1) return cache[n];
  11.     else cache[n]= f(n-1)+f(n-2);
  12.     return cache[n]; 
  13. }
  14.  
  15. int main()
  16. {
  17.   std::cout << f(5);
  18.  return 0;
  19. }
Success #stdin #stdout 0.01s 2724KB
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https://ideone.com/p3hDf
language:
C++ (gcc 8.3)
created:
11 years ago
visibility:
public

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