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#include <iostream>
#include <vector>
using namespace std;

int main() {
    int N;
    cin>>N;
    int const C = 1000000;
    int a[C],b[C],T = 0;
    vector<int> V;
    for(int i=0; i<C; ++i) {
        int m = i;
        int t = 0;
        while(m > 0) {
            if(m % 2 == 1) t++;
            m = m / 2;
        }
        T += t;
        b[i] = t;
        a[i] = T;
    }
    for(int i=C-1; i>0; --i) {
        if(a[i] >= N && a[i-1] < N) {
            V.push_back(i);
            N -= b[i];
        }
    }
    cout<<V.size()<<endl;
    for(int i=0; i<V.size(); ++i) cout<<V[i]<<" ";
    cout<<endl;
    
    return 0;
}