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posted @ 2014-06-12 19:54 tanchao 阅读(18) 评论(0) 推荐(0)
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 @ 2014-06-12 00:20 tanchao 阅读(123) 评论(0) 推荐(0)