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

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

Node*head=NULL,*tail;

//void deletion(int val)

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