import java.lang.*;

class LinkedList {
    Node head;

    // Node Class
    class Node{
        int data;
        Node next;

        Node(int x) // parameterized constructor
        {
            data = x;
            next = null;
        }
    }
    public void deleteStart()
    {
        if (head == null){
            System.out.println("List is empty, not possible to delete");
            return;
        }

        System.out.println("Deleted: " + head.data);
        // move head to next node
        head = head.next;
    }

    public Node insert(int data)
    {
        Node newNode = new Node(data);
        newNode.next = head;
        head = newNode;

        return head;
    }

    public void display()
    {
        Node node = head;
        //as linked list will end when Node reaches Null
        while(node!=null)
        {
            System.out.print(node.data + " ");
            node = node.next;
        }
        System.out.println("\n");
    }
}
public class Main
{
    public static void main(String args[])
    {
        LinkedList ll = new LinkedList();

        ll.insert(6);
        ll.insert(5);
        ll.insert(4);
        ll.insert(3);
        ll.insert(2);
        ll.insert(1);

        ll.display();

        ll.deleteStart();
        ll.display();

        ll.deleteStart();
        ll.deleteStart();
        ll.deleteStart();
        ll.display();
    }
}

import java.lang.*;

// Node Class
class Node {
    int data;
    Node next;

    Node(int x) // parameterized constructor
    {
        data = x;
        next = null;
    }
}

class Main
{
    public static Node deleteStart(Node head)
    {
        if (head == null){
            System.out.println("List is empty, not possible to delete");
            return head;
        }

        System.out.println("Deleted: " + head.data);
        // move head to next node
        head = head.next;

        return head;
    }

    public static Node insert(Node head, int data)
    {
        Node newNode = new Node(data);
        newNode.next = head;
        head = newNode;

        return head;
    }
    static void display(Node node) {

        //as linked list will end when Node is Null
        while (node != null) {
            System.out.print(node.data + " ");
            node = node.next;
        }
        System.out.println("\n");
    }
    

    public static void main(String args[])
    {
        Node head = null;

        head = insert(head, 6);
        head = insert(head, 5);
        head = insert(head, 4);
        head = insert(head, 3);
        head = insert(head, 2);
        head = insert(head, 1);
        display(head);

        head = deleteStart(head);
        display(head);

        head = deleteStart(head);
        head = deleteStart(head);
        head = deleteStart(head);
        display(head);

    }
}