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Solution: All O`one Data Structure

Explore the design and implementation of the AllOne data structure that maintains key frequencies with constant time operations. Learn how to combine a doubly linked list and hash maps to efficiently support incrementing, decrementing, and retrieving keys with max and min counts. Understand how to maintain data structure integrity and optimize for interview coding challenges.

Statement

Design a data structure that tracks the frequency of string keys and allows for efficient updates and queries.

Implement the AllOne class with these methods:

  • Constructor: Initializes the data structure.

  • inc(String key): Increases the count of the given key by 11 ...