leetcode 520. Detect Capital

#coding=utf-8

'''

Given a word, you need to judge whether the usage of capitals in it is right or not.

We define the usage of capitals in a word to be right when one of the following cases holds:

All letters in this word are capitals, like "USA".

All letters in this word are not capitals, like "leetcode".

Only the first letter in this word is capital if it has more than one letter, like "Google".

Otherwise, we define that this word doesn't use capitals in a right way.

Example 1:

Input: "USA"

Output: True

Example 2:

Input: "FlaG"

Output: False

'''

#题目理解是，看英文单词大写是否正确

#正确只有三种情况

#1.全部大写    2.只有首字母大写      3.全部小写

class Solution(object):

    def detectCapitalUse(self, word):#我的代码

        """

        :type word: str

        :rtype: bool

        """

        result=[]

        flag=1

        for x in word:

            if x.isupper():

                flag=1

                result.append(flag)

            else:

                flag=0

                result.append(flag)

        if sum(result)==len(word) or sum(result)==0 or (sum(result)==1 and sum(result[1:])==0):

            return True

        else:

            return False

    #leetcode里面的优秀答案

    def detectCapitalUse1(self, word):

        return word.isupper() or word.islower() or word.istitle()   #别人精简的代码，符合题意就行,不过我发现它runs了55ms,我上面的代码runs42ms,哈哈，好神奇

s=Solution()

print s.detectCapitalUse("loSe")