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Grokking the Coding Interview Patterns in C++

Solution: Inorder Successor in BST

Discover how to identify the inorder successor of a given node in a binary search tree by applying a depth-first search approach. Understand how to traverse the tree efficiently using BST properties to locate the smallest value greater than the target node, and learn the algorithm’s time and space complexities.

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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 ...