力扣leetcode-cn.com/problems/convert-bst-to-greater-tree/ 题目描述 给定一个二叉搜索树(Binary Search Tree),把它转换成为累加树(Greater Tree),使得每个节点的值是原来的节点值加上所有大于它的节点值之和。 例如: 输入: 原始二叉搜索树: 5 / \ 2 13 输出: 转换为累加树: 18 / \ 20 13 注意...
https://leetcode-cn.com/problems/binary-tree-inorder-traversal/ Given an integer n, generate all structurally unique BST's (binary search trees) that store values 1 ... n. 题意 给定一个整数 n,生成所有由 1 ... n 为节点所组成的 二叉搜索树 。 样例 解题 https://www.cnblogs.com/techfl...
【LeetCode OJ】Validate Binary Search Tree Problem Link: https://oj.leetcode.com/problems/validate-binary-search-tree/ We inorder-traverse the tree, and for each node we check if current_node.val > prev_node.val. The code is as follows. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 ...
链接:https://leetcode-cn.com/problems/find-mode-in-binary-search-tree/solution/501-er-cha-sou-suo-shu-zhong-de-zhong-shu-bao-li-t/ 来源:力扣(LeetCode) 著作权归作者所有。商业转载请联系作者获得授权,非商业转载请注明出处。 思路 暴力统计法 这看到这道题目,最直观的方法一定是把这个树都遍历了,...
return dfs(root.Left, low, &root.Val) && dfs(root.Right, &root.Val, high) } 题目链接: Validate Binary Search Tree: leetcode.com/problems/v 带因子的二叉树: leetcode.cn/problems/va LeetCode 日更第 209 天,感谢阅读至此的你 欢迎点赞、收藏鼓励支持小满 ...
https://leetcode.com/problems/convert-sorted-array-to-binary-search-tree/ Given an array where elements are sorted in ascending order, convert it to a height balanced BST. 分析: Input:So we're given a sorted array in ascending order. ...
LeetCode-095-不同的二叉搜索树 II 不同的二叉搜索树 II题目描述：给你一个整数 n ，请你生成并返回所有由 n 个节点组成且节点值从 1 到 n 互不相同的不同 二叉搜索树 。可以按 任意顺序 返回答案。二叉搜索树（Binary Search Tree）：又称二叉排序树，它或者是一棵空树，或者是具有下列性质的二叉树： ...
Two elements of a binary search tree (BST) are swapped by mistake. Recover the tree without changing its structure. Note: A solution using O(n) space is pretty straight forward. Could you devise a constant space solution?二叉排序树中有两个节点被交换了,要求把树恢复成二叉排序树。
class AVLTree{ public: AVLTree(){} TreeNode *build(vector<int> &nums){ TreeNode *root = nullptr; for(int num:nums){ TreeNode *node = insert(root,nullptr,num); adjust(root,node); } return root; } private: //存放每个节点的父节点和深度 ...
* Definition for a binary tree node. * public class TreeNode { * int val; * TreeNode left; * TreeNode right; * TreeNode(int x) { val = x; } * } */classSolution{publicbooleanisValidBST(TreeNoderoot){Integermin=null;Integermax=null;returnisValid(root,min,max);}publicbooleanisValid...