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Grokking the Coding Interview Patterns in C++

Binary Tree Zigzag Level Order Traversal

Understand how to traverse a binary tree in zigzag level order, alternating between left-to-right and right-to-left directions at each level. Explore the breadth-first search approach and practice implementing the traversal efficiently to solve common tree problems.

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Statement

Given a binary tree, return its zigzag level order traversal. The zigzag level order traversal corresponds to traversing nodes from left to right for one level, and then right to left for the next level, and so on, reversing direction after every level.

Constraints:

  • The number of nodes in the tree is in the range 00 ...