Day 15: Linked List Hackerrank Solution Java For Explanation Check Video: Sample Input STDIN Function ----- -------- 4 T = 4 2 first data = 2 3 4 1 fourth data = 1 Sample Output 2 3 4 1 Code: import java.io.*; import java.util.*; class Node { int data; Node next; Node( int d) { data = d; next = null; } } class Solution { public static Node insert(Node head, int data) { Node n = new Node(data); if (head==null){ return n; } else { Node temp = head; while (temp.next!=null){ temp = temp.next; } temp.next = n; return head; } } public static void display(Node head) { Node start = head; while (start != null) { System.out.print(start.data + " " ); start = start.next; } } public static void main(String args[]) {