// editor4
#include<stdio.h>
#include<stdlib.h>
typedef struct node{
    int data,num;
    struct node*next;
}Node;
Node*head=NULL,*tail=NULL;
void create(int num){
    Node*newNode=(Node*)malloc(sizeof(Node));
    newNode->data=num;
    newNode->num=NULL;
}
if(head==NULL){
    newNode=head;
    newNode=tail;
    }else
    {
    tail=newNode;
    tail->next=newNode
    }
void display(){
    int itr,size,num,i;
    for(i=0,i<size,i++)
    arr[15]=num;
}
if(size<0){
    printf("Invalid input");
    return 0;
    }
void*inOrder(int num){
    int iter,size,top;
    arr[10]=top++;
    }
}