2017年12月4日
LeetCode 653. Two Sum IV - Input is a BST
摘要： Given a Binary Search Tree and a target number, return true if there exist two elements in the BST such that their sum is equal to the given target. E 阅读全文
posted @ 2017-12-04 21:30 zeroingToOne 阅读(122) 评论(0) 推荐(0)
LeetCode 671. Second Minimum Node In a Binary Tree
摘要： Given a non-empty special binary tree consisting of nodes with the non-negative value, where each node in this tree has exactly two or zero sub-node. 阅读全文
posted @ 2017-12-04 20:39 zeroingToOne 阅读(238) 评论(0) 推荐(0)