88. Validate Binary Search Tree

MediumTree

Given the root of a binary tree, determine if it is a valid binary search tree. Tree is given as level-order array.

Examples

Input: [5,1,4,null,null,3,6]

Output: false

Explanation: Public test case for Validate Binary Search Tree

Constraints

  • Number of nodes in the tree is in the range [1, 10^4]
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