C++ :

#include <iostream>
using namespace std;
int m,n,k,a;
main()
{
      cin>>k;
      m=1; n=1;
      while (m+n<=k) 
      {
           a=n;
           n=m;
           m=a+m; 
      }
      cout<<"m="<<n<<endl<<"n="<<m;
}