作业

• 周一 83题 - 链表去重

https://leetcode-cn.com/problems/remove-duplicates-from-sorted-list/

• 周二 92题 -反转链表 ||

https://leetcode-cn.com/problems/reverse-linked-list-ii/

• 92-反转链表-前置题：

https://leetcode-cn.com/problems/reverse-linked-list/

• 周三 61题 https://leetcode-cn.com/problems/rotate-list/
• 周四 24题 https://leetcode-cn.com/problems/swap-nodes-in-pairs/

• [x] 周五 19题 -删除链表的倒数第 N 个结点

  https://leetcode-cn.com/problems/remove-nth-node-from-end-of-list/