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Grokking the Coding Interview Patterns in JavaScript

Solution: Closest Binary Search Tree Value

Explore how to identify the node value in a binary search tree closest to a given target using depth-first search. Understand leveraging BST properties to narrow down search paths and optimize time and space complexity effectively.

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Statement

Given the root of a binary search tree and a floating point target value, find the node value in the BST that is closest to target. If there are multiple node values with the same minimum distance to target, return the smallest among them.

Note: The target is a floating point number, while all node values are integers.

Constraints:

  • The number of nodes in the tree is in the range [1,104][1, 10^4].

  • 0≤0 \leq Node.val ≤10 ...