// editor4
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data;
    struct node *next;
}Node;
Node *head=NULL,*tail;
Node *first,*second;
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;
}
}