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#include<bits/stdc++.h>
using namespace std;
#define pb push_back
int main() {
  ios_base::sync_with_stdio(0); cin.tie(0);
  int n;
  cin >> n;
  int sum=0, m=0;
  while(sum<n) {
    ++m;
    sum+=__builtin_popcount(m);
  }
  vector<int>ans;
  while(m>0) {
    if(sum-__builtin_popcount(m)>=n) sum-=__builtin_popcount(m);
    else ans.pb(m);
    --m;
  }
  cout << ans.size() << '\n';
  for(auto i : ans) cout << i << " ";
  cout << '\n';
}