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DIY: Insert, Delete, and GetRandom in O(1)

Explore how to implement a set that allows insertions, deletions, and random element retrieval all in average constant time. This lesson guides you through creating functions that efficiently manage data presence and random access, preparing you for coding interviews with Amazon-style challenges.

Problem statement

Implement a set data structure that can perform the following operations:

  • insert(data): This function should insert data into the set (if the set does not contain it already). It should return false if the data already exists in the set. Otherwise,
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