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Grokking the Coding Interview Patterns in Go

Solution: Inorder Successor in BST

Understand how to use depth-first search to find the inorder successor in a binary search tree. This lesson helps you apply BST properties to traverse nodes efficiently and determine the next greater node after a given one.

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Statement

You are given the root node of a binary search tree and a specific node p. Your task is to return the inorder successor of this p node. If there is no inorder successor of the given node, return NULL.

Note: The inorder successor of p is the node with the smallest value greater than p.data in the binary search tree.

Constraints:

  • The tree contains nodes in the range ...