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#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
#ifdef LOCAL
#define debug(...) __VA_ARGS__
#else
#define debug(...) {}
#endif
int pre[1000005];
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    int i;
    int n;
    cin>>n;
    for (i = 1; i < n+1; i++){
        int akt = 0;
        for (int j = 0; j < 20; j++){
            if (i&(1<<j)) akt++;
        }
        pre[i] = pre[i-1]+akt;
    }
    vector<int> wy;
    for (i = n; i ; i--){
        if (pre[i] >= n && pre[i-1] < n){
            wy.push_back(i);
            for (int j = 0; j < 20; j++) if (i&(1<<j)) n--;
        }
    }
    cout<<wy.size()<<"\n";
    for (int j : wy) cout<<j<<" ";
    cout<<"\n";
    return 0;
}