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

ifstream f("damesah.in");
ofstream g("damesah.out");
int main()
{
    int n, k;
    f>>n;
    if(n==4)
        g<<2<<" "<<4<<" "<<1<<" "<<3<<'\n'<<2;
    else
    {
        k=1;
        while(k<=n)
        {
            g<<k<<" ";
            k = k+2;
        }
        k=2;
        while(k<=n)
        {
            g<<k<<" ";
            k = k+2;
        }
        g<<'\n'<<n;
    }
    return 0;
}