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

const int MAX_N = 5e5+7;

int n, tab[MAX_N], s, i;
vector<int> vec;

int main() {
	ios_base::sync_with_stdio(0); cin.tie(0); cout.tie(0);
    cin>>n;
    for (i = 1; s < n; i++) {
        tab[i] = __builtin_popcount(i);
        s+=tab[i];
    }

    for (int j = i; j > 0; j--) {
        if (s - tab[j] >= n)
            s-=tab[j];
        else
            vec.push_back(j);
    }

    cout<<vec.size()<<"\n";
    for (int i = 0; i < vec.size(); i++) {
        cout<<vec[i]<<" ";
    }
}