#include <iostream>
#include <algorithm>
using namespace std;
int n,i,a[101][101],b[100001],t,j;
int main()
{
    cin>>n;
    while (n>0)
    {
        b[++t]=n/2;
        if (b[t]<=0) t--;
        b[t]=n/2+1;
        if (b[++t]<=0) t--;
        b[++t]=n/2-1;
        if (b[t]<=0) t--;
        n/=2;
    }
    for (i=98-t;i>=2;i--) b[++t]=i;
    cout<<t<<'\n';
    for (i=1;i<=t;i++) cout<<b[i]<<" ";
    return 0;
}