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Solution: All O`one Data Structure

Explore how to design the AllOne data structure that tracks string key frequencies and supports increment, decrement, and retrieval of max and min keys in constant time. Understand the use of a doubly linked list combined with hash maps to maintain efficient updates and enable O(1) time complexity across all operations.

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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 ...