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#include <iostream>
#include <vector>

int main() {
  std::ios_base::sync_with_stdio(false);
  std::cin.tie(NULL);
  std::cout.tie(NULL);

  int n; 
  std::vector<int> res;
  std::cin >> n;

  int sum = 0, i = 0;

  while (sum < n) {
    sum += __builtin_popcount(++i);
  }

  for (int j = i; j >= 1; j--) {
    if (sum - __builtin_popcount(j) < n) {
      res.push_back(j);
    }
    else {
      sum -= __builtin_popcount(j);
    }
  }

  std::cout << res.size() << "\n";

  for (auto j : res) {
    std::cout << j << " "; 
  }

  std::cout << '\n';
}