原题地址：https://oj.leetcode.com/problems/reverse-words-in-a-string/

题意：

Given an input string, reverse the string word by word.

For example,
Given s = "the sky is blue",
return "blue is sky the".

解题思路：这题很能体现python处理字符串的强大功能。

代码：

class Solution:
    # @param s, a string
    # @return a string
    def reverseWords(self, s):
        return " ".join(s.split()[::-1])