typedef struct node{
    int data;
    struct node *next;
}Node;
Node *head = NULL,*tail;
void create(int num){
    Node *newnode=(*Node) malloc sizeof(1 * 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);
    }
}