Day14 - 344. 反转字符串

题目链接：https://leetcode.cn/problems/reverse-string/description/

核心方法：双指针-交换

class Solution:
    def reverseString(self, s: List[str]) -> None:

        left,right = 0,len(s) - 1

        while left < right:
            s[left],s[right] = s[right],s[left]
            left += 1
            right -= 1