#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 * sizeod(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->next)
    printf(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;
}