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#include <bits/stdc++.h>

using namespace std;

int main() {
  int n;
  cin >> n;
  int s = 0;
  int i = 0;
  vector<int> a;
  while (s < n) {
    i++;
    s += __builtin_popcount(i);
    a.push_back(i);
  }
  i = a.size()-1;
  vector<int> bad(a.size()+1);
  int ans = a.size();
  while (s > n) {
    if (s - __builtin_popcount(a[i]) >= n) {
      bad[i] = true;
      ans--;
      s -= __builtin_popcount(a[i]);
    }
    i--;
  }
  cout << ans << '\n';
  for (int i = a.size()-1; i >= 0; i--) {
    if (!bad[i]) cout << a[i] << ' ';
  }
}