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

typedef struct node{
    int data;
    struct node *next;
}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){
    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 size,itr,num;
        if(size<0){
            printf("Invalid input");
            return 0;
        }
        for(itr=0;itr<size;itr++){
            if(!(scanf("%d",&num))){
                printf("Invalid input");
            }
            create(num);
        }
        display();
        return 0;
    }
}