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#include<bits/stdc++.h>
using namespace std;
#define st first
#define nd second

const int INF = 1e6 + 7;
int n, k, licz, roz, wart, t[INF];
long long pref[INF];

int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);
    cin >> n;
    for(int i = 1; i <= 1e6; i++){
        int x = i;
        while(x > 0){
            if(x % 2 == 1){
                licz++;
            }
            x /= 2;
        }
        t[i] = licz;
        licz = 0;
        pref[i] += pref[i - 1];
        pref[i] += t[i];
        if(pref[i] > n){
            k = i;
            wart = pref[i];
            break;
        }
        if(pref[i] == n){
            cout << i << endl;
            for(int j = i; j >= 1; j--){
                cout << j << " ";
            }
            return 0;
        }
    }
    roz = wart - n;
    int res = k;
    for(int i = k; i >= 1; i--){
        if(t[i] <= roz){
            roz -= t[i];
            t[i] = 0;
            res--;
        }
    }
    cout << res << endl;
    for(int i = k; i >= 1; i--){
        if(t[i] > 0){
            cout << i << " ";
        }
    }
}