LeetCode 144. Binary Tree Preorder Traversal - Iterative & Recursive solutions explained

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Binary Tree Preorder Traversal iterative version using stack is a frequently asked question in coding interviews. DFS is the core of the logic again here .If you haven't yet seen the 3 simple steps to master dfs you must watch that. I have used those steps here while solving this problem too. In this session, I wrote two versions of the solution also please do the homework for a more optimized solution. #tree #leetcode #preorder

0:00 Preorder traversal DFS
2:45 Iterative approach with Stack

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