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

struct Node{
    int data;
    struct Node*prev;
    struct Node*next;
};
struct Node* createNode(int data){
    struct Node* newNode=(struct Node*) malloc(sizeof(struct Node));
    newNode->data=data;
    newNode->prev=NULL;
    newNode->next=NULL;
    return newNode;
}

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