題目

出處

Given a string, you need to reverse the order of characters in each word within a sentence while still preserving whitespace and initial word order.

Example 1:

Input: "Let's take LeetCode contest"
Output: "s'teL ekat edoCteeL tsetnoc"

Note: In the string, each word is separated by single space and there will not be any extra space in the string.

思路

由于字符串中每個單詞僅有一個space區分開，而且沒有多余的空格，所以

1. 將字符串轉化為list；
2. 遍歷list中的每個元素，將其反轉，并存入到一個新的list中；
3. 將新的list用space.join()操作生成新的字符串并返回。

代碼(python)

class Solution(object):

    def reverseWords(self, s):
        """
        :type s: str
        :rtype: str
        """

        li = s.split()
        res = []
        for each in li:
            res.append(each[::-1])

        return  ' '.join(res)