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#include <bits/stdc++.h>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
    int n;
    cin >> n;

    int cnt = 0;
    int i = 1;
    for (; cnt < n; i++) {
        // count set bits of i
        for (int j = 0; j < 32; j++) {
            if (i & (1 << j))
                cnt++;
        }
        // cout << i << " " << cnt << endl;
    }
    i--;
    vector<int> res;
    res.push_back(i--);
    while (cnt > n) {
        int tmp = 0;
        // count set bits of i
        for (int j = 0; j < 32; j++) {
            if (i & (1 << j))
                tmp++;
        }
        if (cnt - tmp >= n) {
            cnt -= tmp;
        } else {
            res.push_back(i);
        }
        i--;
    }
    while (i > 0)
        res.push_back(i--);

    cout << res.size() << endl;
    for (int i = 0; i < res.size(); i++)
        cout << res[i] << " ";
    cout << endl;

    return 0;
}