LeetCode——1305. 两棵二叉搜索树中的所有元素

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LeetCode——1305. 两棵二叉搜索树中的所有元素

给你 root1 和 root2 这两棵二叉搜索树. 请你返回一个列表,其中包含两棵树中的所有整数并按升序排序.. 示例 1: 输入:root1 = [2,1,4], root2 = [1,0,3] 输出:[0,1,1,2,3,4] 示例 2: 输入:root1 = [0,-10,10], root2 = [5,1,7,0,2] 输出:[-10,0,0,1,2,5,7,10] 示例 3: 输入:root1 = [], root2 = [5,1,7,0,2] 输出:[0,1,2,5,7]…

Leetcode：1305. 两棵二叉搜索树中的所有元素

Leetcode:1305. 两棵二叉搜索树中的所有元素 Leetcode:1305. 两棵二叉搜索树中的所有元素思路 BST树中序历遍有序. 利用双指针法可以在\(O(n)\)的复杂度内完成排序. 基于上述两个点,可以很简单的做出这道题. 先中序历遍得到两个有序的数列. 利用双指针法,只需历遍一次就可以得到升序的答案. Talk is cheap . Show me the code . /** * Definition for a binary tree node. * struct Tr…

[LeetCode] Delete Node in a BST 删除二叉搜索树中的节点

Given a root node reference of a BST and a key, delete the node with the given key in the BST. Return the root node reference (possibly updated) of the BST. Basically, the deletion can be divided into two stages: Search for a node to remove. If the n…

[LeetCode] 450. Delete Node in a BST 删除二叉搜索树中的节点

Given a root node reference of a BST and a key, delete the node with the given key in the BST. Return the root node reference (possibly updated) of the BST. Basically, the deletion can be divided into two stages: Search for a node to remove. If the n…

[LeetCode]230. 二叉搜索树中第K小的元素(BST)（中序遍历）、530. 二叉搜索树的最小绝对差（BST）（中序遍历）

题目230. 二叉搜索树中第K小的元素给定一个二叉搜索树,编写一个函数 kthSmallest 来查找其中第 k 个最小的元素. 题解中序遍历BST,得到有序序列,返回有序序列的k-1号元素. 代码 class Solution { public int kthSmallest(TreeNode root, int k) { List<Integer> list = new LinkedList<>(); inorder(root,list); return list.get(…

[LeetCode] Insert into a Binary Search Tree 二叉搜索树中插入结点

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. No…