The BST Validation Problem Everyone Gets Wrong

People coming for first time https://www.youtube.com/watch?v=qH2VQY48mg4&list=PLbJhGqY-mq47k_WLUtzVjmarUm1EuXPj2&pp=gAQBsAgC Find the pattern sheet here: https://docs.google.com/spreadsheets/d/1T5-nGsJ9WNwna44e9WWRD0jlZIT5KxVOGvylcvvVrY8/edit?usp=sharing Watch the dsa pattern series from beginning In this video, we solve two important BST problems from LeetCode — Validate Binary Search Tree (LeetCode 98) and Recover Binary Search Tree (LeetCode 99). These are must-know problems for coding interviews at Google, Amazon, Meta, and other top companies. We'll cover the intuition, dry run, brute force, and optimal approaches using inorder traversal. By the end, you'll understand how to detect if a BST is valid and how to fix a BST where exactly two nodes are swapped. 🔹 Topics Covered: What makes a valid BST Inorder traversal property of BSTs Range-based validation (min/max approach) Morris Traversal for O(1) space recovery Identifying swapped nodes using inorder 📌 Problems: LeetCode 98 – Validate Binary Search Tree LeetCode 99 – Recover Binary Search Tree ⏱ Timestamps: 0:00 – Introduction (fill in as needed) 👍 Like, Subscribe & Hit the Bell for more tree & DSA content! #dsa #leetcode #bst #trees #codinginterview Tags: validate binary search tree, recover binary search tree, leetcode 98, leetcode 99, validate bst leetcode, recover bst leetcode, binary search tree, bst problems, tree series, inorder traversal bst, is valid bst, recover bst optimal, morris traversal, validate bst recursion, validate bst iterative, bst interview questions, dsa tree series, leetcode tree problems, coding interview trees, binary tree, data structures and algorithms, dsa playlist, leetcode medium, validate bst explained, recover bst explained, bst inorder property, tree problems for interviews, google interview questions, amazon coding interview, meta interview prep, leetcode solutions, dsa for beginners, competitive programming, bst validate and recover, tree traversal, binary search tree validation, swap nodes bst, fix bst, coding interview preparation आज का वीडियो बाइनरी सर्च ट्री (BST) पर केंद्रित है, जहाँ हम दो मध्यम से कठिन स्तर के प्रश्नों को हल कर रहे हैं। हम पहले BST की वैधता की जाँच करने पर ध्यान देंगे, जो "tree data structure" का एक महत्वपूर्ण पहलू है। यह "data structures and algorithms" सीरीज का हिस्सा है और "data structure in hindi" में समझाया गया है।