#include <cstdio>
#include <climits>
#include <cmath>
#include <cstdlib>

using namespace std;

int main()
{
    int V[1000],n,i;
    i=0;
    scanf("%d",&n);
    for(i=1;i<=n;i++)
        {
        scanf("%d",&V[i]);
        }
    for(i=1;i<=n;i++)
        {
        if(i%2==0) printf("%d ",V[i]);
        }
    printf("\n");
    for(i=n;i>=1;i--)
        {
        if(i%2!=0) printf("%d ",V[i]);
        }
    return 0;
    }