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Grokking the Coding Interview Patterns in Python

Invert Binary Tree

Explore how to invert a binary tree by swapping its left and right child nodes, creating a mirror image of the original. Learn the depth-first search method to traverse and transform the tree, developing skills crucial for solving tree-based coding interview problems efficiently.

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Statement

Given the root node of a binary tree, transform the tree by swapping each node’s left and right subtrees, thus creating a mirror image of the original tree. Return the root of the transformed tree.

Constraints:

  • 0≤0\leq
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