// editor2
#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=num;
    newnode->prev=NULL;
    newnode->next=NULL;
    if(head==NULL){
        head=tail=node;
    }
    else{
        tail->next=newnode;
        newnode->prev=tail;
        tail=newnode;
    }
}
void display(){
    nd *itr=head;
    while(itr!=NULL){
        printf("%d",itr->data);
        itr=itr->next;
        
        }
    }
    int main(){
        int n,num;
        scanf("%d",&n);
        if(n<0){
            printf("Invalid Input");
            return 0;
        }
        for(int i=0,i<n;i++){
            scanf("%d",&num);
            create(num);
            
        }
        display();
        return 0;
    }