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Correct me if I'm wrong, but this is visiting every value of the tree twice, when it is only necessary to visit them once if you do the condition checking inside your tree traversal. Then, it becomes more efficient to use preorder traversal to you can exit early on a subtree without visiting every node in it.
Trees: Is This a Binary Search Tree?
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Correct me if I'm wrong, but this is visiting every value of the tree twice, when it is only necessary to visit them once if you do the condition checking inside your tree traversal. Then, it becomes more efficient to use preorder traversal to you can exit early on a subtree without visiting every node in it.