#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 create(int num){
    Node*(newNode)=(Node*)malloc(1*sizeof(newNode));
    
    newNode->data=num;
    newNode->prev=NULL;
    newNode->next=NULL;
    
    if(head==NULL){
        head=newNode;
        tail=newNode;
    }
    else{
        newNode->prev=tail;
        newNode->next=NULL;
        tail=newNode;
    }
}
void display(){
    Node*itr;
    for(itr=head;itr!=NULL;itr=itr->data){
        printf("%d",itr->data)    
    }
    
    
}
int main(){
    int size,ind,itr,num;
    
    if(!scanf("%d",&size)){
        printf("Invalid input");
    }
    
    for(itr=0;itr<size;itr++){
        scanf("%d ",&num);
        
    }
    
    create(num);
    display();
    return 0;
}