网站上微信的链接怎么做北京优化seo排名

设置头尾两个指针，依靠中间变量temp交换头尾指针所指元素，头指针后移，尾指针前移，直到头尾指针重合或者头指针在尾指针后面一个元素

class Solution(object):def reverseString(self, s):""":type s: List[str]:rtype: None Do not return anything, modify s in-place instead."""temp = 0i,j = 0,len(s)-1while i<j:temp = s[i]s[i] = s[j]s[j] = tempi += 1j -= 1if j == i-1 or i == j:return sclass Solution(object):def reverseString(self, s):""":type s: List[str]:rtype: None Do not return anything, modify s in-place instead."""return s.reverse()