import java.util.Arrays;
import java.util.Scanner;
public class Bai1 {
Scanner sc
= new Scanner
(System.
in); private int n;
private int arr[] = new int[10000];
public void input(){
n = sc.nextInt();
for(int i=0; i<n; i++)
arr[i] = sc.nextInt();
}
public void show(){
for(int i=0; i<n; i++)
System.
out.
print(arr
[i
] + " "); for(int i=n-1; i>=0; i--)
System.
out.
print(arr
[i
] + " "); }
public static void main
(String[] args
) { Bai1 tmp = new Bai1();
tmp.input();
tmp.show();
}
}
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