2015年8月10日
*Reverse Linked List
摘要： 题目：Reverse a singly linked list.代码：看不懂，我已经没救了 1 public ListNode reverseList(ListNode head) { 2 if (head == null) return head; 3 Li... 阅读全文
posted @ 2015-08-10 13:41 Hygeia 阅读(102) 评论(0) 推荐(0)
*Validate Binary Search Tree
摘要： 题目： Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: The left subtree of a node contains 阅读全文
posted @ 2015-08-10 07:22 Hygeia 阅读(164) 评论(0) 推荐(0)
*Binary Search Tree Iterator
摘要： 题目：Implement an iterator over a binary search tree (BST). Your iterator will be initialized with the root node of a BST.Callingnext()will return the n... 阅读全文
posted @ 2015-08-10 06:13 Hygeia 阅读(241) 评论(0) 推荐(0)