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