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