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  4. Day 23: BST Level-Order Traversal

Day 23: BST Level-Order Traversal

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Objective
Today, we're going further with Binary Search Trees. Check out the Tutorial tab for learning materials and an instructional video!

Task
A level-order traversal, also known as a breadth-first search, visits each level of a tree's nodes from left to right, top to bottom. You are given a pointer, , pointing to the root of a binary search tree. Complete the levelOrder function provided in your editor so that it prints the level-order traversal of the binary search tree.

Hint: You'll find a queue helpful in completing this challenge.

Function Description

Complete the levelOrder function in the editor below.

levelOrder has the following parameter:
- Node pointer root: a reference to the root of the tree

Prints
- Print node.data items as space-separated line of integers. No return value is expected.

Input Format

The locked stub code in your editor reads the following inputs and assembles them into a BST:
The first line contains an integer, (the number of test cases).
The subsequent lines each contain an integer, , denoting the value of an element that must be added to the BST.

Constraints


Output Format

Print the value of each node in the tree's level-order traversal as a single line of space-separated integers.

Sample Input

6
3
5
4
7
2
1

Sample Output

3 2 5 1 4 7 

Explanation

The input forms the following binary search tree:

We traverse each level of the tree from the root downward, and we process the nodes at each level from left to right. The resulting level-order traversal is , and we print these data values as a single line of space-separated integers.

Author

vatsalchanana

Difficulty

Easy

Max Score

30

Submitted By

107064

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