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

int main() {
  cin.tie(0);
  cout.tie(0);
  ios_base::sync_with_stdio(0);

  int n;
  cin >> n;

  vector<int> data;

  long long cnt = 0;
  int i = 1;
  while (cnt < n) {
    int bits = __builtin_popcount(i);
    cnt += bits;

    i++;
  }

  int j = i - 1;
  while (j > 0) {
    int bits = __builtin_popcount(j);

    if (cnt - bits >= n) {
      cnt -= bits;
    } else {
      data.push_back(j);
    }
    j--;
  }

  cout << data.size() << '\n';
  for (int i = 0; i < data.size(); i++) {
    cout << data[i] << " ";
  }

  return 0;
}