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Grokking the Coding Interview Patterns in JavaScript

Solution: Delete Nodes And Return Forest

Explore how to solve the problem of deleting nodes from a binary tree and returning the resulting forest of disjoint trees. Understand the step-by-step approach using depth-first search to detach nodes and track new tree roots, while analyzing time and space complexity for efficient implementation.

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Statement

Given the root of a binary tree where each node has a unique value, your task is to delete all nodes with values specified in the deleteNodes array. After performing the deletions, the tree will split into a forest—a collection of disjoint trees. Return the roots of the remaining trees in the forest in any order.

Constraints:

  • 0≤0\leq nodes ≤100\leq100 ...