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#include <iostream>
#include <vector>

using namespace std;

#define MAX_O 120300

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n;
    cin >> n;
    int tab[MAX_O];
    int s = 0;
    for(int i = 0; i < MAX_O; i++)
    {
        s += __builtin_popcount(i);
        tab[i] = s;
    }
    int x = 0;
    while (tab[x] < n) x++;
    int y = tab[x];
    vector<int> odp;
    while(x > 0 && (y - n >= 0))
    {
        if ((y - n > 0) && (__builtin_popcount(x) <= y - n))
        {
            y -= __builtin_popcount(x);
        } else {
            odp.push_back(x);
        }
        x--;
    }
    cout << odp.size() << endl;
    for(auto i : odp) cout << i << " ";
    return 0;
}