[38] LeetCode: Binary Tree Preorder Traversal | Step-by-Step Solution
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[38] LeetCode: Binary Tree Preorder Traversal | Step-by-Step Solution
LeetCode Problem #144: Binary Tree Preorder Traversal Difficulty: Easy Language: TypeScript Technique: utilize a helper function and call its helper function inside it (recursion), before that make sure it's following the preorder traversal principle (parent first, left, then right) Functions: Array.push() Music used ...
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