Question: Consider a set of elements being organized as a binary search tree ( BST ) . The elements in the set may be of different

Consider a set of elements being organized as a binary search tree (BST). The elements in
the set may be of different popularity. That is, a few elements are searched for much more
frequently than others. In order to improve the average search time, one can consider
moving an element in the set that is being searched for to the top of the BST (so that if
the same element is searched for again soon, the element is likely close to the top of the
BST and is thus located with fewer node checkings).

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