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Validate Binary Search Tree

medium Solve on LeetCode

Last edited: September 12, 2025

Problem
Examples
Solution
Video explanation
Method 0 - Recursive but Wrong
Intuition
Approach
Code
Method 1 - Recursive but Inefficient - Max Value and Min Value for Each Node
Intuition
Approach
Code
Complexity
Method 3 - Recursive but Efficient way 🏆
Code
Complexity
Method 4 - Iterative Using Queue and Node Modification
Code
Complexity
Method 5 - Inorder Traversal (with and without Aux array)
Code
Complexity
Method 6 - Iterative Solution Using DFS
Code
Complexity

video explanation

Related Tags

bfs binary-search-tree binary-tree bst-binary-search-tree daily-coding-problem dfs leetcode traversal/inorder traversal/level-order video

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