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Apr 29th, 2017
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C++ 0.43 KB | None | 0 0
  1. #include <iostream>
  2.  
  3. using namespace std;
  4.  
  5. int fib(int n)
  6. {
  7.   return n==0 ? 0 : n == 1 ? 1 : fib(n-1) + fib(n-2);
  8. }
  9. int main()
  10. {
  11.     int n;
  12.     unsigned long long int seka[81];
  13.     cin >> n;
  14.     for(int i = 0;i<=n;i++){
  15.       if(i==0){
  16.         seka[i]=0;
  17.       }
  18.       else if(i==1){
  19.         seka[i]=1;
  20.       }
  21.       else{
  22.         seka[i] = seka[i-1] + seka[i-2];
  23.       }
  24.     }
  25.     cout << seka[n];
  26.     return 0;
  27. }
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