Bullseye - Cows and Bulls

Your goal is to find the computer's secret number with a minimum number of suggestions.



On each guess the game announces the number of "cows" and "bulls" in your suggestion. If the matching digits are on their right positions, they are "bulls", if they are on different positions, they are "cows". To win you must reveal the secret number.





Example: secret number is 8207



1st guess: 1234 (1 Bull)

The bull is 2 - digit is in the number and in the correct position



2nd guess: 1705 (1 Bull 1 Cow)

The bull is 0 - digit is in the number and in the correct position

The cow is 7 - digit is in the number and but in the wrong position



3rd guess: 8207 (4 Bulls)

All digits are bulls because they are all in the number and in the correct positions