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#include <bits/stdc++.h>

using namespace std;
vector<int> W;
vector<int> S;
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    int n;
    cin>>n;
    int il=0;
    int i=1;
    while(il<n){
        il = il+ __builtin_popcount(i);
        W.push_back(__builtin_popcount(i));
        S.push_back(i);
        i++;
    }
    int wyn = S.size();
    for(int j=S.size()-1;j>=0;j--){
        if(il-W[j]>=n){
            il-=W[j];
            S[j]=-1;
            wyn--;
        }
    }
    cout<<wyn<<"\n";
    for(int j=S.size()-1;j>=0;j--){
        if(S[j]==-1){
            continue;
        }
        else{
            cout<<S[j]<<" ";
        }
    }
    cout<<"\n";

}