问题描述: Given a binary search tree with non-negative values, find the minimum absolute difference between values of any two nodes. 示例: nput:1\3/2Output:1Explanation:The minimum absolute differenc
问题描述: Given a Binary Search Tree (BST), convert it to a Greater Tree such that every key of the original BST is changed to the original key plus sum of all keys greater than the original key in BST.
题意:给你n和h ,问有多少 棵n个节点高度 为h的二叉搜索树(标号为1-n,只有一个节点的树高为0),答案 对10^9+7取模。 思路:设dp[ n ][ h ]为 n 个节点高度不超过 h 的二叉搜索树的个数。那么 dpn,h=∑i=0n-1dpi,h−1⋅dpn−i-1,h−1 即选定一个点,枚举左子树的个数为 i ,剩余右子树的个数即为n - 1 - i 。详见代码:
. 序言 开启python刷题时代,主要也是为了面试。 . 题目 Given the root node of a binary search tree and two integers low and high, return the sum of values of all nodes with a value in the inclusive range [low, high].
Question: Given a binary search tree, write a function kthSmallest to find the kth smallest element in it. Note: You may assume k is always valid, 1 ≤ k ≤ BST's total elements. Follow up: What
题目: Given a binary search tree and a node in it, find the in-order successor of that node in the BST. Note: If the given node has no in-order successor in the tree, return null. 题解: 用了递归。循环应该略有难
题目 Given the root node of a binary search tree, return the sum of values of all nodes with value between L and R (inclusive). The binary search tree is guaranteed to have unique values. Example 1: