#include <iostream>

using namespace std;
int n,p=1,nr;
int main()
{
    cin>>n;
    while(p<n)
    {
        nr++;
        p*=2;
    }
    cout<<nr<<'\n';
    p=1;
    while(p<n)
    {
        cout<<p<<" ";
        p*=2;
    }
    return 0;
}