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Grokking the Coding Interview Patterns in Python

Subtree of Another Tree

Understand how to verify if one binary tree is a subtree of another by matching all descendants and nodes. This lesson guides you to implement an efficient solution using O(m x n) time and O(m + n) space, helping improve your problem-solving skills for coding interviews.

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Statement

Given the roots of two binary trees, root and sub_root, return TRUE if there is a subtree of root with the same structure and nodes as sub_root. Otherwise, return FALSE.

A tree can only be considered a subtree of the root tree iff all the descendants (children) of the node appear in sub_root.

Constraints:

  • The number of nodes in the root tree is in the range [1,500].[1,500]. ...