# 151. Reverse Words in a String

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# Question

Given an input string s, reverse the order of the words.

A word is defined as a sequence of non-space characters. The words in s will be separated by at least one space.

Return a string of the words in reverse order concatenated by a single space.

Note that s may contain leading or trailing spaces or multiple spaces between two words. The returned string should only have a single space separating the words. Do not include any extra spaces.

Example 1:

Input: s = "the sky is blue"
Output: "blue is sky the"

# Solution

Using reg expression with build in split function makes this question really easy.

class Solution:
    def reverseWords(self, s: str) -> str:
        return " ".join(re.split("\s+", s.strip())[::-1])