## Check if Binary Tree is BST

Problem Statement: You are given the root of a binary tree. The task is to determine if the given binary

## Search in a Binary Search Tree

Write a program to search a node with a given value in a binary search tree. Example: Disclaimer: Don’t jump

## Count Number of Nodes in a Binary Tree

In this article, we will solve the most asked coding interview problem: Count Number of Nodes in a Binary Tree

## Subset sum equal to target (DP- 14)

In this article, we will solve the most asked coding interview problem: Subset sum equal to target. In this article,

## 3-d DP : Ninja and his friends (DP-13)

In this article, we will solve the most asked coding interview problem: Ninja and his friends. Problem Link: Ninja and

## Tower of Hanoi

Problem Statement: “The Tower of Hanoi, is a mathematical problem which consists of three rods and multiple disks. Initially, all

## Binary Search Tree : BST Introduction

In this article, we will be going to discuss the Binary Search Tree data structure. Pre-req: Binary Tree, Tree Traversals

## Maximum Xor Queries | Trie

In this article, we will solve the most asked interview question: “Maximum Xor Queries”. Problem Link – Maximum Xor Queries