// editor4
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node*next;
}Node;
void create(int num){
    Node*newNode=(node*)malloc(1*sizeof(node));
    newNode->data=num;
    newnode->next=NULL;
    if(head ==NULL){
        head=newNode;
        tail=newNode;
    }else{
        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,num,i;
    scanf("%d",&num);
    if(n<0){
        printf("Invalid input");
    }
    for(i=0,i<n;i++){
        scanf("%d",&n);
          return 0;
          
        }
        create(num);
        display();
        return 0;
    
}