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#include <bits/stdc++.h>
// #define MULTIPLE_TESTS
// #define ENDLESS_TESTS
#define TIME_LIMIT 1
// #define MEMORY_LIMIT 512

using namespace std;

void test()
{
    int required;
    cin >> required;

    int power = 0;
    int number = 0;

    while (power < required)
    {
        number += 1;
        const int current_power = __builtin_popcount(number);
        power += current_power;
    }

    vector<int> answer;
    answer.reserve(number);

    while (number > 0)
    {
        const int current_power = __builtin_popcount(number);

        if (power - current_power < required)
        {
            answer.push_back(number);
        }
        else
        {
            power -= current_power;
        }

        number -= 1;
    }

    cout << answer.size() << '\n';

    for (const auto v : answer)
    {
        cout << v << ' ';
    }

    cout << '\n';
}


int main()
{
#ifndef CONTEST_WORKSPACE
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
#endif

#ifdef ENDLESS_TESTS
    while(!(cin >> std::ws).eof())
        test();
#else
    int T = 0;

#ifdef MULTIPLE_TESTS
    cin >> T;
#else
    T = 1;
#endif

    while (T --> 0)
        test();
#endif

    return 0;
}