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#include <iostream>
#include <bits/stdc++.h>

using namespace std;

int Suma(int n)
{
    int i = 0;
    while(n)
    {
        if(n%2)i++;
        n/=2;
    }
    return i;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    int n;
    cin >> n;

    vector<int> seq;

    int bitsCount = 0;
    int k = 1;
    while(bitsCount < n)
    {
        seq.push_back(k);
        bitsCount+= Suma(k);
        k++;
    }

    int bitsToRemove = bitsCount - n;
    k = seq.size() - 1;
    while(bitsToRemove > 0)
    {
        if (bitsToRemove - Suma(seq[k]) >= 0)
        {
            bitsToRemove -= Suma(seq[k]);
            seq.erase(seq.begin() + k);
        }
        k--;
    }

    cout << seq.size() << endl;

    for(int i = seq.size()-1 ; i >= 0 ; --i)
    {
        cout << seq[i] << " ";
    }

    return 0;
}