HackerRank Questions

Check if a number is Panagram or Not

Given a number N containing even number of digits. The task is to check whether that number is palindrome or not. Input : N = 10239876540022Output : YesExplanation: N contains all the digits from 0 to 9. Therefore, it is a pangram. Simple Approach: 1. Given a number containing… Read More ›

Tower of Hanoi Using Recursion

Tower of Hanoi Using Recursion

The tower of Hanoi is a famous puzzle where we have three rods and N disks. The objective of the puzzle is to move the entire stack to another rod. You are given the number of discs N. Initially, these discs are in the rod 1. You need to print all the steps of discs movement so that all the discs reach the 3rd rod. Also, you need to find the total moves.
Note: The discs are arranged such that the top disc is numbered 1 and the bottom-most disc is numbered N. Also, all the discs have different sizes and a bigger disc cannot be put on the top of a smaller disc. Refer the provided link to get a better clarity about the puzzle.

Insert a Node at the Tail of a Linked List HackerRank Solution.

Insert a Node at the Tail of a Linked List HackerRank Solution.

You are given the pointer to the head node of a linked list and an integer to add to the list. Create a new node with the given integer. Insert this node at the tail of the linked list and return the head node of the linked list formed after inserting this new node. The given head pointer may be null, meaning that the initial list is empty.