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