#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;   //linking
        tail=newNode;         //moving
    }
}

void display(){
    Node *itr;
    for(itr=head;itr!=NULL;itr=itr=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;
}