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Data Structures for Coding Interviews in Python

Solution: Find Nodes at k Distance from the Root

Explore how to find all nodes at a given distance k from the root node in a binary tree. Learn to implement a depth first search approach that recursively traverses the tree and collects nodes at the specified distance, along with understanding its time and space complexity analysis.

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Statement

Given the root node of a binary tree and an integer value k, find all the nodes at a distance of k from the root node.

Constraints:

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

  • 1≤1 \leq n ≤500\leq 500
  • 0≤0 \leq
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