Kotlin Binary Tree Preorder Traversal (A Recursive Solution and Without Using Recursion)by@okyrcheuskaya

Kotlin Binary Tree Preorder Traversal (A Recursive Solution and Without Using Recursion)

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Algorithm has a time complexity of O(n), where n is the number of nodes in the tree. It uses a stack to keep track of the nodes that still need to be visited. I apologize for the confusion and for any inconvenience this may have caused. Let me know if you have any other questions.
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