// editor3
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
    struct node *prev;
}nd;
nd *head=NULL,*tail;
void create(int num){
    nd *newnode=(nd*)malloc(1*sizeof(nd));
    newnode->data=head;
    newnode->next=NULL;
    newnode->prev=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        newnode->prev=tail;
        tail=newnode;
    }
}
    void display(){
        nd *itr;
        for(itr=head;itr!=NULL;itr=itr->next){
            printf("%d",&itr->data);
        }
    }
    int main(){
    int n,num;
        scanf("%d",&n);
        if(n<0){
            printf("Invalid input");
        }
        for(int i=0;i<n;i++){
            if(!scanf("%d",&num)){
              printf("Invalid input");
            }
            create(num);
        }
        display();
        return 0;
    }