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

typedef long long ll;
typedef unsigned int ui;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<long long> vll;
const ll LINF = 1e18;
const int INF = 1e9;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);

    int n;
    cin >> n;

    int last = 0;
    int bit_cnt = 0;
    while (bit_cnt < n) {
        ++last;
        bit_cnt += __builtin_popcount(last);
    }

    vi result;
    result.reserve(last);

    for (int i = last; i > 0; --i) {
        int cnt = __builtin_popcount(i);
        if (bit_cnt - cnt >= n) {
            bit_cnt -= cnt;
        } else {
            result.push_back(i);
        }
    }

    cout << result.size() << '\n';
    for (size_t i = 0; i < result.size(); ++i) {
        cout << result[i] << ' ';
    }
    cout << '\n';

    return 0;
}