Solution: Bulls and Cows
Explore how to solve the Bulls and Cows number guessing game using a hash map. Understand how to count bulls (correct digits in correct positions) and cows (correct digits in wrong positions) efficiently in one pass through the input strings. This lesson helps you implement an optimized solution that runs in linear time using constant space, enhancing your coding interview skills with hash maps.
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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
secretand theguessbut ...