#include<stdio.h>
#include<stdlib.h>

typedef struct node
{
    int data;
    struct node *next;
    struct node *prev;
}Node;

Node *head=NULL,*tail;

void create(int num)
{
    Node *newnode=(Node*)malloc(sizeof(Node));
    newnode->data=num;
    newnode->next=NULL;
    newnode->prev=NULL;
    if(head==NULL)
    {
        head=newnode;
    }
    head->prev=newnode;
    newnode->next=head;
    head=newnode;
}
void insert(val)
{
    newnode->data=val;
    head->prev=newnode;
    newnode->next=head;
    head=newnode;
}
void display()
{
    Node *itr;
    for(itr=head;itr!=NULL;itr=itr->next)
        printf("%d",&itr->data);
}
int main()
{
    int n,num,itr,val;
    scanf("%d",&n);
    if(n<=0){
        printf("Invalid input");
        return 0;
    }
    for(itr=0;itr<n;itr++)
    {
        scanf("%d",&num);
        create(num);
    }
    scanf("%d",&val);
    insert(val);
    display();
    return 0;
}