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

const int N = 1e6;
int prefbitsum[N];

void preprocess() {
  for (int i = 1; i < N; i++) {
    prefbitsum[i] = prefbitsum[i - 1] + __builtin_popcount(i);
  }
}

void solve(int n) {
  preprocess();

  vector<int> answer;
  for (int i = N - 1; i > 0 && n > 0; i--) {
    if (prefbitsum[i - 1] < n) {
      answer.push_back(i);
      n -= __builtin_popcount(i);
    }
  }   

  cout << answer.size() << endl;
  for (int x : answer) {
    cout << x << " ";
  }
  cout << endl;
}

int main() {
  ios_base::sync_with_stdio(false);
  int n;
  cin >> n;
  solve(n);
}