This code is my solution to the Tree: Preorder Traversal practice problem. If interest you can take a look at the requirements using the following link:
https://www.hackerrank.com/challenges/tree-preorder-traversal/problem?h_r=internal-search
A description of my approach may be found in my blog using the following link:
https://www.johncanessa.com/2020/07/20/tree-preorder-traversal/
Enjoy;
John