题目描述：
Write a function to delete a node (except the tail) in a singly linked list, given only access to that node.
Supposed the linked list is 1 -> 2 -> 3 -> 4 and you are given the third ...
归档 2015
[LeetCode]Delete Node in a Linked List
[LeetCode]Lowest Common Ancestor of a Binary Tree
作者是
发布于
在
LeetCode.
题目描述：
Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.
According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w as the ...
[LeetCode]Lowest Common Ancestor of a Binary Search Tree
作者是
发布于
在
LeetCode.
题目描述：
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.
According to the definition of LCA on Wikipedia: “The lowest common ancestor is defined between two nodes v and w ...
[LeetCode]Linked List Cycle II
作者是
发布于
在
LeetCode.
题目描述：
Given a linked list, return the node where the cycle begins. If there is no cycle, return null.
Follow up:
Can you solve it without using extra space?
题目大意：
给定一个链表，返回循环的起始节点。如果没有环，则返回空。
进一步思考：
你可以在不使用额外空间的条件下完成题目吗？
解题思路：
参考LeetCode Discuss（https ...
[LeetCode]Palindrome Linked List
作者是
发布于
在
LeetCode.
题目描述：
Given a singly linked list, determine if it is a palindrome.
Follow up:
Could you do it in O(n) time and O(1) space?
题目大意：
给定一个单链表，判断它是否是回文。
进一步思考：
你可以在O(n)时间复杂度和O(1)空间复杂度完成吗？
解题思路：
1). 使用快慢指针寻找链表中点
2). 将链表的后半部分就地逆置 ...