#include<stdio.h>
 int mani()
 {
 	int n;
 	scanf("%d",&n);
 	int a[n];
 	scanf("%d",a);
 	if(n%2)
 	{for(i=n,i>=0,i-2)
 	printf("%d",a[i]);
 	for(i=n-1,i>=0,i-2)
 	printf("%d",a[i]);
 	}
 	else if
 	{for(i=n,i>=0,i-2)
 	printf("%d",a[i]);
 	for(i=n-1,i>=0,i-2)
 	printf("%d",a[i]);
 	}
 	return 0;
 }