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1. You are given a partially written function to solve.Input Format
2. Determine if it is a valid binary search tree (BST).
3. A valid BST is defined as follows:
3.1 The left subtree of a node contains only nodes with keys less than the node's key.
3.2 The right subtree of a node contains only nodes with keys greater than the node's key.
3.3 Both the left and right subtrees must also be binary search trees.
Input is managed for you.Output Format
output is managed for you.Question Video
0 <= Number of Nodes <= 10^9Sample Input
-10^9 <= value of Node data <= 10^9
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