Solution: Find Ancestors of a Given Node in a BST

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.

• $1 \leq n \leq 500$
• $10^{-3 }\leq$ Node.data $\leq 10^3$
• The value k exists within the binary search tree
• All Node.data are unique