Datawhale编程实践（LeetCode 腾讯精选练习50）Task17

1.反转字符串https://leetcode-cn.com/problems/reverse-string/

 一开始没想到，看了解答才恍然大悟原来这么简单

双指针法

class Solution:
    def reverseString(self, s: List[str]) -> None:
        """
        Do not return anything, modify s in-place instead.
        """
        for i in range(len(s)//2):
            tmp = s[i]
            s[i] = s[len(s)-i-1]
            s[len(s)-i-1] = tmp

时间复杂度65.6%

 

 

 

2.翻转字符串中的单词 IIIhttps://leetcode-cn.com/problems/reverse-words-in-a-string-iii/