Binary Tree Zigzag or Spiral Level Order Traversal | Tree Data Structure playlist C++ | Hello World

This is the video under the series of DATA STRUCTURE & ALGORITHM in a TREE Playlist. We are going to understand How to find the Zigzag Level Order Traversal of a Binary Tree or Level order traversal in spiral form. We understand How to use Queue data structure for Finding Level Order Traversal.
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► 103. Binary Tree Zigzag Level Order Traversal
Given the root of a binary tree, return the zigzag level order traversal of its nodes' values. (i.e., from left to right, then right to left for the next level and alternate between).

Input: root = [3,9,20,null,null,15,7]
Output: [[3],[20,9],[15,7]]

or

Input:
10
/ \
20 30
/ \
40 60
Output: 10 20 30 60 40

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Home Work: https://practice.geeksforgeeks.org/pr...

Binary Tree Zigzag Level Order Traversal: https://leetcode.com/problems/binary-...
Level order traversal in the spiral form: https://practice.geeksforgeeks.org/pr...

code in This Video: https://github.com/Prince-1501/Hello_...

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