// editor2
#include<stdio.h>
#include<stdlib.h>

typedef struct Node{
    int data;
    struct Node*next;
    struct Node*prev;
    
}Node;
Node* head = NULL;

Node*createNode(int val){
    Node* n=(Node *)malloc(sizeof(Node));
    n->data=val;
    n->prev=NULL;
    n->next=NULL;
    
    return n;
}
void insertAtEnd(int val){
    Node*newNode=createNode(val);
    if(head==NULL){
        head=newNode;
        return;
    }
    Node* temp=head;
    while(temp->next!=NULL){
        temp=temp->next;
    }
    temp->next=newNode;
    newNode->prev=temp;
}
 void removeDuplicates(){
     
 }
 void display(){
     Node*temp=head;
     while(temp!=NULL){
         printf("%d ",temp->data);
         temp=temp->next;
     }
 }
 int main (){
     int n;
     scanf("%d",&n);
     if(n<=0){
         printf("Invalid input");
         return 0;
     }
     for (int i=0;i<;i++){
         int a;
         if(!scanf("%d",&a)){
             printf("Invalid input");
         return 0;
         }
         
         insertAtEnd(a);
     }
     display();
     return 0;
 }