#include <iostream>
#include <set>
#include <stack>
#include <fstream>
using namespace std;
int n, i, k, sir[1001];

int main()
{
    cin>>n;
    for(i=1; i<=n; i=i*2)
    {
        k++;
        sir[k]=i;
    }
    cout<<k<<"\n";
    for(i=1; i<=k; i++)
    {
        cout<<sir[i]<<" ";
    }
}