#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=itr->data)
    {
        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",&size))
        {
            printf("invalid input");
            return 0;
        }
        create(num);
    }
    display();
    return 0;
}