Validate Binary Search Tree
Explore the method to determine if a binary tree is a valid binary search tree. Understand how to verify that each node satisfies the BST properties by using depth-first search, ensuring all left subtree nodes are less and right subtree nodes are greater. This lesson helps you implement and test your solution effectively.
We'll cover the following...
We'll cover the following...
Statement
Given the root of a binary tree, check whether it is a valid binary search tree (BST).
A binary tree is a valid BST if for every node:
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The left subtree of a node contains only nodes with keys less than the node’s key.
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The right subtree of a node contains only nodes with keys greater than the node’s key.
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Both the left and right subtrees are valid BSTs.
Constraints:
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