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Data Structures with Generic Types in Python

Solution: Skiplists

Explore how to implement and optimize the find method in Python skiplists to avoid redundant comparisons. This lesson guides you through improving search efficiency by modifying the find_pred_node function, helping you deepen your understanding of skiplist operations and advanced data structure management.

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Task

Here is the solution that implements the find(x) method in a SkiplistSSet sometimes performs redundant comparisons; these occur when x is compared to the same value more than once. They can occur when, for some node, u, u.next[r] = u.next[r − 1]. Modify the find(x) so that these redundant comparisons are avoided.

Solution

The find_pred_node(self, x) method in the SkiplistSSet() ...