TreeNode* searchBST(TreeNode* root,intval) {while(root && root->val !=val) { root= (root->val > val) ? root->left : root->right; }returnroot; } }; 类似题目: Closest Binary Search Tree Value Insert into a Binary Search Tree 参考资料: https://leetcode.com/problems/search-in-a-...
LeetCode题解之 Search in a Binary Search Tree 1、题目描述 2.问题分析 利用递归遍历二叉查找树。 3、代码 1TreeNode* searchBST(TreeNode* root,intval) {2if(root ==NULL)3returnNULL;4elseif(root->val >val)5returnsearchBST(root->left, val);6elseif(root->val <val)7returnsearchBST(root->...
今天介绍的是LeetCode算法题中Easy级别的第163题(顺位题号是700)。给定一个二叉搜索树(BST)的和正整数val。 你需要在BST中找到节点的值等于给定val的节点。返回以该节点为根的子树。如果此节点不存在,则应返回null。例如: 鉴于树: 4 / \ 2 7 / \ 1 3 ...
Given a binary search tree (BST), find the lowest common ancestor (LCA) of two given nodes in the BST.According to the definition of LCA on Wikipedia:“The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has both p and q as descendants (wher...
给定二叉搜索树(BST)的根节点和要插入树中的值,将值插入二叉搜索树。返回插入后二叉搜索树的根节点。保证原始二叉搜索树中不存在新值。 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...
The right subtree of a node contains only nodes with keys greater than or equal to the node's key. Both the left and right subtrees must also be binary search trees. Example: For example: Given BST [1,null,2,2], 1 \ 2 /
题目地址:https://leetcode.com/problems/insert-into-a-binary-search-tree/description/ 题目描述 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 guarante...
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. ...
解释: 节点 2 和节点 4 的最近公共祖先是 2, 因为根据定义最近公共祖先节点可以为节点本身。 说明: 所有节点的值都是唯一的。 p、q 为不同节点且均存在于给定的二叉搜索树中。 来源:力扣(LeetCode) 链接:https://leetcode.cn/problems/... 著作权归领扣网络所有。商业转载请联系官方授权,非商业转载请注明...
# Definition for a binary tree node. # class TreeNode: # def __init__(self, val=0, left=None, right=None): # self.val = val # self.left = left # self.right = right class BSTIterator: def __init__(self, root: Optional[TreeNode]): # 初始化一个空结点栈(所有结点的左子结点...