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Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as a binary tree in which the dept 阅读全文
posted @ 2017-10-21 22:18
daniel456
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Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 题目含义：给定了一个升序的数组，转换成一个平衡二叉树 阅读全文
posted @ 2017-10-21 17:46
daniel456
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Given a binary tree, return the bottom-up level order traversal of its nodes' values. (ie, from left to right, level by level from leaf to root). For 阅读全文
posted @ 2017-10-21 17:43
daniel456
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Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest l 阅读全文
posted @ 2017-10-21 17:37
daniel456
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Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical a 阅读全文
posted @ 2017-10-21 17:14
daniel456
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You are given a binary tree in which each node contains an integer value. Find the number of paths that sum to a given value. The path does not need t 阅读全文
posted @ 2017-10-21 17:13
daniel456
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