Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in C#

Bulls and Cows

Explore how to apply hash maps to solve the Bulls and Cows guessing game. Understand the logic behind counting exact matches and misplaced digits, and implement a solution that returns hints in 'xAyB' format. This lesson helps you grasp problem analysis and hash map usage for interview challenges.

We'll cover the following...

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 in different positions. (These are non-bull digits that could become bulls if rearranged.) ...