#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <map>
#include <set>
#include <chrono>
#include <functional>
#include <cstdlib>
using namespace std;


int getBitCount(int number)
{
  int result = 0;
  while (number > 0)
  {
    result += (number & 1);
    number >>= 1;
  }
  return result;
}


int main()
{
  const clock_t begin_time = clock();
  ios::sync_with_stdio(false);
  int n;
  std::cin >> n;

  std::vector<int> bitCounts;
  std::vector<int> sums;
  int currentNumber=0;
  int sum=0;
  do
  {
    int bitCount = getBitCount(currentNumber);
    sum += bitCount;
    bitCounts.push_back(bitCount);
    sums.push_back(sum);
    currentNumber++;
  } while (sum < n);
  int remainingSum = n;
  std::vector<int> results;
  for (; currentNumber>0; --currentNumber)
  {
    if (sums[currentNumber - 1] < remainingSum)
    {
      results.push_back(currentNumber);
      remainingSum -= bitCounts[currentNumber];
    }
  }
  std::cout << results.size() << "\n";
  for (auto number: results)
    std::cout << number << " ";

  //std::cout << float(clock() - begin_time) / CLOCKS_PER_SEC << "\n";
  return 0;
};