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#include <iostream>
#include <vector>
using namespace std;
int bity(int x) {
    int i = 0;
    while (x > 0) {
        if (x%2) i++;
        x /= 2;
    }
    return i;
}

int inna(int a, int b, int bitA, int bitB) {
    int tmp=b+1, tmpBit=bity(tmp);
    while (tmp < a && tmpBit != bitA + bitB) {
        tmp++;
        tmpBit = bity(tmp);
    }
    if (tmpBit == bitA + bitB && tmp!=a) return tmp;
    else return -1;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int n, tmp1=0;
    cin >> n;
    vector<pair<int, int> > ciag;
    int x = 1;
    while (tmp1 < n) {
        int r = bity(x);
        if (r <= n - tmp1) {
            ciag.push_back(make_pair(x, r));
            tmp1 += r;
        }
        x++;
    }
    for (int i = ciag.size() - 1; i > 0; i--) {
        //cout << "D: " << ciag[i].first << endl;
        for (int j = i - 1; j >= 0; j--) {
            int x = inna(ciag[i].first, ciag[i - 1].first, ciag[i].second, ciag[j].second);
            if (x != -1) {
                ciag[i] = make_pair(x, ciag[i].second + ciag[j].second);
                ciag.erase(ciag.begin() + j);
                //cout << "D\n";
                i--;
            }
        }
    }

    cout << ciag.size()<<endl;
    for (int i = ciag.size() - 1; i >= 0; i--) printf("%i ", ciag[i].first);
    return 0;
}