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Jan 18th, 2015
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C++ 0.28 KB | None | 0 0
  1. #include <iostream>
  2. using namespace std;
  3.  
  4. int main()
  5. {
  6.     long long n, f=1, fi;
  7.     long long fib[44];
  8.     cin>>n;
  9.     fib[1]=1;
  10.     fib[2]=1;
  11.     for(int i=3; i<=45; i++)
  12.     {
  13.         fib[i]=fib[i-1]+fib[i-2];
  14.         if(n>=fib[i]) { f=fib[i]; fi=i; }
  15.     }
  16.     fi++;
  17.     f=fib[fi];
  18.     cout<<f<<endl;
  19. }
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