20240623 520 - Easy - Array

520. Detect Capital

class Solution:
    def detectCapitalUse(self, word: str) -> bool:
        def isCapital(c):
            return "A" <= c <= "Z"
        isFirstC = isCapital(word[0])
        isSecondC = False
        for i in range(1, len(word)):
            if i == 1: 
                isSecondC = isCapital(word[i])
            if isFirstC:
                if isSecondC != isCapital(word[i]):
                    return False
            else:
                if isCapital(word[i]):
                    return False
        return True