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#include <bits/stdc++.h>
using namespace std;

int main() {
    ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    int N; cin >> N;
    int lim = N;
    vector<int> res;
    vector<int> rere;

    for (int i = 1; i <= N && lim > 0; ++i) {
        int pop_cnt = __builtin_popcount(i);
        res.push_back(i);
        lim -= pop_cnt;
    }

    lim = abs(lim);

    for (int i = res.size() - 1; i >= 0; --i) {
        int pop_cnt = __builtin_popcount(res[i]);
        if (lim >= pop_cnt) {
            lim -= pop_cnt;
        }
        else 
            rere.push_back(res[i]);
    }

    cout << rere.size() << "\n";
    for (auto p : rere) cout << p << " ";


}