摘要：1. 206. 反转链表输入：head = [1,2,3,4,5]输出：[5,4,3,2,1] class Solution(object): def reverseList(self, head): """ :type head: ListNode :rtype: ListNode """ pre 阅读全文

摘要：Python数据类型不可变 int, float, string, tuple >>> a = 1>>> b = 1>>> print(id(a))140454796502904>>> print(id(b))140454796502904# a b 地址一样 >>> a = 1>>> x = co 阅读全文