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Grokking the Coding Interview Patterns in C++

Solution: Symmetric Tree

Understand how to verify if a binary tree is symmetric by comparing its left and right subtrees iteratively using a queue. Explore a BFS approach to check mirror symmetry efficiently, including handling null nodes and ensuring node values match.

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Statement

Given the root of a binary tree, check whether it is a symmetric tree. A symmetric tree refers to a tree that is the mirror of itself, i.e., symmetric around its root.

Constraints:

  • The tree contains nodes in the range [1,500][1, 500]
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