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

typedef long long LL;

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);

    // -----------------------------------------------------------------------------------
    
    int n;
    cin>>n;
    int res=0;
    stack<int> s1;
    queue<int> s2;
    int i=1;
    while(res<n){
        s1.push(i);
        res+=__builtin_popcount(i);
        i++;
    }
    while(!s1.empty()){
        if(res-__builtin_popcount(s1.top())<n){
            s2.push(s1.top());
        }else res-=__builtin_popcount(s1.top());
        s1.pop();
    }
    cout<<s2.size()<<endl;
    while(!s2.empty()){
        cout<<s2.front()<<" ";
        s2.pop();
    }

    // -----------------------------------------------------------------------------------

    return 0;
}