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