2015年3月25日
Sum Root to Leaf Numbers
摘要： Given a binary tree containing digits from0-9only, each root-to-leaf path could represent a number.An example is the root-to-leaf path1->2->3which rep... 阅读全文
posted @ 2015-03-25 17:24 mrpod2g 阅读(139) 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:The left subtree of a node contains only n... 阅读全文
posted @ 2015-03-25 14:49 mrpod2g 阅读(127) 评论(0) 推荐(0)
Binary Tree Postorder Traversal
摘要： Given a binary tree, return thepostordertraversal of its nodes' values.For example:Given binary tree{1,#,2,3}, 1 \ 2 / 3return[3,2,1].递归... 阅读全文
posted @ 2015-03-25 00:07 mrpod2g 阅读(97) 评论(0) 推荐(0)