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#include <bits/stdc++.h>

using namespace std;

typedef long long ll;
typedef long double ld;
typedef vector<int> vi;
typedef pair<int,int> pi;
typedef pair<double,double> pd;
typedef pair<ll,ll> pl;

int policz(int x){
  int ans = 0;
  for(int i = 0; i <= 30; i++){
    if(x&(1<<i)) ans++;
  }
  return ans;
}

int main(){

  ios::sync_with_stdio(0);
  cin.tie(0);

  int x;
  cin >> x;

  int ans = 0;
  int counter = 0;
  while (ans < x){
    counter++;
    ans += policz(counter);
  }

  if(ans == x){
    cout << counter << '\n';
    for(int i = counter; i >= 1; i--) cout << i << ' ';
  }
  else{
    cout << counter-1 << '\n';
    int do_odjecia = ans-x;
    bool odjete = false;
    for(int i = counter; i >= 1; i--){
      if(policz(i) == do_odjecia && !odjete) odjete = true;
      else cout << i << ' ';
    }

  }

  return 0;
}

//g++ -O3 -static -Wall .cpp -std=c++17