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Solution: Bulls and Cows

Explore how to implement a hash map-based solution for the Bulls and Cows problem, a popular interview question. Learn to count bulls and cows in one pass using hash tables while optimizing time and space complexity. This lesson helps you apply hash map strategies effectively for coding interviews.

Statement

You are playing a number guessing game called “Bulls and Cows” with a friend.

You write down a secret number, and your friend tries to guess it. After each guess, you provide a hint based on the following:

  • Bulls: The number of digits that are in the correct position in the guess.

  • Cows: The number of digits that are in both the secret and the guess but ...