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Grokking the Coding Interview Patterns in C++

Binary Tree Level Order Traversal

Explore how to implement level order traversal for binary trees in C++. Understand the process of visiting nodes level by level and returning their values separated by a character. This lesson helps you handle trees with up to 500 nodes and manage empty trees by returning a specific output.

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Statement

Given the root of a binary tree, display the values of its nodes while performing a level order traversal. Return the node values for all levels in a string separated by the character :. If the tree is empty, i.e., the number of nodes is 00, then return “None” as the output.

Constraints:

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