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Data Structures for Coding Interviews in Python

Challenge: Find Ancestors of a Given Node in a BST

Explore how to identify all ancestor nodes of a specific value within a binary search tree. This lesson helps you understand the path from the root to any node and implement an efficient solution using Python.

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Statement

Given the root node of a binary search tree (BST) and an integer value k, find all the ancestors of the node whose value is k.

An ancestor of a node in a tree is any node on the path from the root to that node.

Constraints:

Let n be the number of nodes in a binary search tree.

  • 1≤n≤5001 \leq n \leq 500
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