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I must agree. Not knowing how the tree was constructed based on the input - how it sets the root etc, made it difficult for me. Perhaps it was explained in a previous challenge somewhere but I did not find that.
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Is This a Binary Search Tree?
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I must agree. Not knowing how the tree was constructed based on the input - how it sets the root etc, made it difficult for me. Perhaps it was explained in a previous challenge somewhere but I did not find that.