#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node*next;
    struct node*prev;
}Node;
Node*head=NULL,*tail,*iter;
void create(int num)
{
 Node*newNode=(Node*)malloc(sizeof(Node));
 newNode->data=num;
 newNode->next=NULL;

if(head==NULL)
{
    head==newNode;
    tail=newNode;
}
else
{
    newNode->next=tail;
    tail->next=newNode;
    tail=newNode;
}
}
void deletion(int val){
    iter=head;
    if(head->data==val){
        head=head->next;
        head=newNode;
    }
    else if(tail->data==val){
        tail->prev->next=newNode;
    }
    else{
        while(iter!=NULL){
            if(iter->data==val){
                iter->next->prev=iter->prev;
                iter->prev->next=iter->next;
            }
            iter->next=iter;
        }
    }
}
void display(){
    Node*itr;
    for(itr=head;itr!=NULL;itr=itr->next)
        printf("%d",itr->data);
    
}
int main(){
    int size,num,itr,val;
    scanf("%d",&size);
    for(itr=1;itr<=size;itr++){
        scanf("%d",&num);
        create (num);
    }
    deletion(val);
    if(iter==NULL)
        printf("Invalid input");
    
    else
    display();
    return 0;
}