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#include <bits/stdc++.h>

using namespace std;

int n;

vector <int> sumy;

int policz_sume_bitow(int x)
{
    int s = 0;

    while (x != 0)
    {
        s += x%2;
        x /= 2;
    }

    return s;
}

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

    cin >> n;

    sumy.push_back(0);

    for (int i = 1; i <= n; i++)
        sumy.push_back(policz_sume_bitow(i));

    int suma = 0;

    int i = 1;

    while (suma < n)
    {
        suma += sumy[i];
        i++;
    }

    if (suma == n)
    {
        cout << i-1 << "\n";
        for (int j = i-1; j >= 1; j--)
            cout << j << " ";
    }
    else
    {
        int k = i-1;

        while (sumy[k] != suma-n)
            k--;

        cout << i-2 << "\n";

        for (int j = i-1; j >= 1; j--)
            if (j != k)
                cout << j << " ";
    }

    exit(0);
}