#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;
    for(itr=head;itr!=NULL;itr->next)
    printf("%d",itr->data);
}
int main()
{
    int size,itr,num;
    scanf("%d",&size);
    if(size<0){
        printf("Invalid input");
        return 0;
    }
    for(itr=1;itr<=size;itr++)
    {
        if(!scanf("%d",&num))
        {
            printf("INvalid input");
            return 0;
            
        }
        create(num);
    }
    display();
    return 0;
}