Given the root node of a binary search tree (BST) and a value. You need to find the node in the BST that the node's value equals the given value. Return the subtree rooted with that node. If such node doesn't exist, you should return NULL. For example, Given the tree: 4 / \ ...
1.递归 (一遍ac) classSolution{public:TreeNode*searchBST(TreeNode* root,intval){if(!root)returnnullptr;returnHelper(root,val); }TreeNode*Helper(TreeNode* root,intval){if(root==nullptr)returnroot;if(root->val==val)returnroot;elseif(root->val>val) root=Helper(root->left,val);elseif(root...
You are given therootof a binary search tree (BST) and an integerval. Find the node in the BST that the node's value equalsvaland return the subtree rooted with that node. If such a node does not exist, returnnull. Example 1: ...
LeetCode - 二叉搜索树中的搜索 https网络安全编程算法 原题地址:https://leetcode-cn.com/problems/search-in-a-binary-search-tree/ 晓痴 2019/07/24 7280 LeetCode 450: 删除二叉搜索树中的节点 Delete Node in a BST node.js 给定一个二叉搜索树的根节点 root 和一个值 key,删除二叉搜索树中的 key...
来自专栏 · LeetCode 每日一题 题意 给定一棵二叉搜索树 root ,实现一个迭代器,支持中序遍历这棵二叉搜索树。 要求:next 和 hasNext 操作的平均时间复杂度是 O(1) ,空间复杂度是O(h) ,其中 h 是树的高度。 数据限制 这棵树的结点数在 [0, 10 ^ 5] 内 0 <= Node.val <= 10 ^ 6 hasNext 和...
125 -- 1:40 App LeetCode 每日一题 Daily Challenge 704 Binary Search 372 -- 3:35 App LeetCode 每日一题 Daily Challenge 1305 All Elements in Two Binary Search Trees 188 1 1:34 App LeetCode 每日一题 Daily Challenge 669 Trim a Binary Search Tree 189 -- 4:44 App LeetCode 每日一题 ...
leetcode 501. Find Mode in Binary Search Tree Given a binary search tree (BST) with duplicates, find all themode(s)(the most frequently occurred element) in the given BST. Assume a BST is defined as follows: The left subtree of a node contains only nodes with keysless than or equal ...
Given the root node of a binary search tree (BST) and a value to be inserted into the tree, insert the value into the BST. Return the root node of the BST after the insertion. It is guaranteed that the new value does not exist in the original BST. ...
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 ...
Given the root node of a binary search tree (BST) and a value to be inserted into the tree, insert the value into the BST. Return the root node of the BST after the insertion. It is guaranteed that the new value does not exist in the original BST. ...