// editor3
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
    struct node *prev;
}nd;
nd *head=NULL,*tail;
nd *create(int num){
    nd *newnode=(nd*)malloc(sizeof(nd));
    newnode->data=num;
    newnode->next=NULL;
    newnode->prev=NULL;
    if(head==NULL){
        newnode=head;
        newnode=tail;
    }else{
        newnode->prev=tail;
        tail->next=newnode;
        tail=newnode;
    }
}
void deletion(int val){
    nd *iter=head->next;
    if(head->data==val){
        head=head->next;
        head->prev=NULL;
    }
    else if(tail->data==val){
        tail->prev->next=NULL;
    }else{
        while(iter!=NULL){
            if(iter->data==val){
                iter->next->prev=iter->prev;
                iter->prev->next=iter->next;
                break;
            }
            iter=iter->next;
        }
    }
    }
}
void *display(){
    nd *itr=head;
    for(itr=0;itr!=NULL;itr=itr->next){
        printf("%d",itr->data);
    }
}
int main(){
    int n,num;
    scanf("%d ",&n);
    for(int i=0;i<n;i++){
        scanf("%d",&num);
        create(num);
    }
    delete();
    display();
    return 0;
}