#include <iostream>
#include <vector>


int bit_sum(int i) {
    int r = 0;
    while (i != 0) {
        r += i % 2;
        i /= 2;
    }
    return r;
}


int main() {
    std::ios_base::sync_with_stdio(0);

    int n;
    std::cin >> n;

    std::vector<int> prefix_bit_sum = {0};
    int num = 1;
    while (true) {
        prefix_bit_sum.push_back(prefix_bit_sum.back() + bit_sum(num));
        if (prefix_bit_sum.back() > n) break;
        ++num;
    }

    std::vector<int> res;
    while (n > 0) {
        if (prefix_bit_sum[num - 1] < n) {
            n -= bit_sum(num);
            res.push_back(num);
        }
        --num;
    }

    std::cout << res.size() << "\n";
    for (int x : res) {
        std::cout << x << " ";
    }

    return 0;
}