#include <stdio.h>

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