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Solution: Two Sum III - Data structure design

Explore how to implement the TwoSum class that efficiently manages a stream of numbers to check if two numbers add up to a given target. Understand the use of hash maps to store frequencies and quickly find pairs, improving lookup speed and space management in custom data structures.

Statement

Design a data structure that takes in a stream of numbers and can check if any two numbers add up to a specific value.

Implement the TwoSum class with the following constructor and methods:

  • Constructor: Sets up the TwoSum object with an empty list at the start.

  • void add(int number): Adds a new number to the list.

  • boolean find(int value): Returns TRUE if any two numbers in the list add up to the given value. If not, it returns FALSE.

Constraints:

  • 105-10^5 \leqnumber 105\leq 10^5 ...