2016年3月15日
Path Sum
摘要： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum. F 阅读全文
posted @ 2016-03-15 22:08 YuriFLAG 阅读(123) 评论(0) 推荐(0)
Validate Binary Search Tree
摘要： Given a binary tree, determine if it is a valid binary search tree (BST). Assume a BST is defined as follows: 根据BST的定义进行判断即可。注意：左子树的所有节点都小于根节点，右子树的所有节 阅读全文
posted @ 2016-03-15 09:03 YuriFLAG 阅读(93) 评论(0) 推荐(0)