#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node*next;
    
}a;
a*head=NULL,*tail,*temp;
void create(int num){
    a*newnode=(a*)malloc(1*sizeof(a));
    newnode->data=num;
    newnode->next=NULL;
    if(head==NULL){
        head=newnode;
        tail=newnode;
    }
    else{
        tail->next=newnode;
        tail=newnode;
    }
}
void insertion(){
    if(tail->next==NULL){
        newnode =tail->next;
        newnode->next=NULL;
        tail=newnode;
    }
    else{
        printf("does not exist");
    }
}
void display(){
    a*itr;
    for(itr=head;itr!=NULL;itr=itr->next){
        printf("%d ",itr->data);
    }
}
int main(){
    int size,num,itr;
    scanf("%d",&size);
    if(num<=0){
        printf("Invalid input");
    }
    else{
        printf("%d ",num);
    }
    for(itr=0;itr<size;itr++){
        scanf("%d",&num);
        
    }
    create(num);
    insertion(num);
    display();
    return 0;
}