#include<stdio.h>
#include<stdlib.h>
typedef struct Node{
     int data;
     struct Node*prev;
     struct Node*next;
     }Node;
typedef struct DoubleLinkedList{
     Node*head;
     Node*tail;
     }DoubleLinkedList;
Node*createNode(int data){
     Node*newNode=
     (Node*)malloc(sizeof(Node));
     newNode->data=data;
     newNode->prev=NULL;
     newNode->prev=NULL;
     return n;