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#include <bits/stdc++.h>

using namespace std;

int countBits(int n)
{
    unsigned int count = 0;
    while (n)
    {
        count += n & 1;
        n >>= 1;
    }
    return count;
}

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

    int n;
    cin >> n;

    vector<int> pre(1000005);

    pre[0] = 0;

    int j = -1;

    bool b = true;

    for (int i = 1; i <= 1000001; i++)
    {
        pre[i] = pre[i - 1] + countBits(i);

        if (pre[i] >= n && b)
        {
            b = false;
            j = i;
        }
    }

    if (pre[j] == n)
    {
        cout << j << "\n";
        for (int i = j; i > 0; i--)
        {
            cout << i << " ";
        }
    }
    else
    {
        int k = pre[j] - n;
        int f = -1;

        // cout << "K " << k << "\n";

        for (int i = j; i > 0; i--)
        {
            // cout << "pre " << pre[i] - pre[i - 1] << "\n";
            if (pre[i] - pre[i - 1] == k)
            {
                f = i;
                break;
            }
        }

        // cout << f << "\n";

        cout << j - 1 << "\n";

        for (int i = j; i > 0; i--)
        {
            if (i != f)
                cout << i << " ";
        }
    }
}