[LeetCode] 299. Bulls and Cows

 Problem : https://leetcode.com/problems/bulls-and-cows/

An intuitive solution based on hash table.

class Solution:
    def getHint(self, secret: str, guess: str) -> str:
        counterS = Counter(secret)
        
        bulls = 0
        for i, g in enumerate(guess):
            if g == secret[i]:
                bulls += 1
                counterS[g] -= 1
        
        cows = 0
        for i, g in enumerate(guess):
             if g != secret[i] and g in counterS and counterS[g] > 0:
                cows += 1
                counterS[g] -= 1
        
        return "{}A{}B".format(bulls, cows)