LeetCode Solution: 938. Range Sum of BST

Navigating the BST: Summing Values in a Range (LeetCode 938 Explained!) Hey there, future coding legends! 👋 Vansh2710 here, your friendly neighborhood competitive programmer and technical writer. Today, we're diving into a super common and insightful LeetCode problem: 938. Range Sum of BST . This problem is a fantastic way to solidify your understanding of Binary Search Trees (BSTs) and recursive thinking. It's beginner-friendly, yet it cleverly leverages the unique properties of a BST to make our solution efficient. Let's crack it open! 🧐 Problem Explanation: What Are We Doing? Imagine you have a special kind of tree called a Binary Search Tree (BST) . In a BST, for any given node: All values in its left subtree are smaller than the node's value. All values in its right subtree are larger than the node's value. There are no duplicate values. The problem gives us the root (top-most node) of such a tree, and two numbers: low and high . Our goal is to find the sum of all node values that