#include <iostream>
#include <vector>
#include <set>
#include <queue>
#include <algorithm>
#include <string>
#include <fstream>
#include <cctype>
#include <iomanip>
#include <cmath>
#include <cstring>
#include <map>
#include <bitset>

using namespace std;

bitset<100001> f;
vector<int> chestii;
vector<int> sol;

int main()
{
    //freopen("1.in","r",stdin);
    //freopen("1.out","w",stdout);
    int n;
    cin>>n;
    int t = 1;
    do
    {
        sol.push_back(t);
        t*=2;
    }while(t <= n);
    cout<<sol.size()<<'\n';
    for(int i = 0; i < sol.size(); i++)
        cout<<sol[i]<<' ';
    return 0;
}



//FILE!!!!