{ "data": { "question": { "questionId": "784", "questionFrontendId": "701", "categoryTitle": "Algorithms", "boundTopicId": 1095, "title": "Insert into a Binary Search Tree", "titleSlug": "insert-into-a-binary-search-tree", "content": "

You are given the root node of a binary search tree (BST) and a value to insert into the tree. Return the root node of the BST after the insertion. It is guaranteed that the new value does not exist in the original BST.

\n\n

Notice that there may exist multiple valid ways for the insertion, as long as the tree remains a BST after insertion. You can return any of them.

\n\n

 

\n

Example 1:

\n\"\"\n
\nInput: root = [4,2,7,1,3], val = 5\nOutput: [4,2,7,1,3,5]\nExplanation: Another accepted tree is:\n\"\"\n
\n\n

Example 2:

\n\n
\nInput: root = [40,20,60,10,30,50,70], val = 25\nOutput: [40,20,60,10,30,50,70,null,null,25]\n
\n\n

Example 3:

\n\n
\nInput: root = [4,2,7,1,3,null,null,null,null,null,null], val = 5\nOutput: [4,2,7,1,3,5]\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "二叉搜索树中的插入操作", "translatedContent": "

给定二叉搜索树（BST）的根节点 root 和要插入树中的值 value ，将值插入二叉搜索树。 返回插入后二叉搜索树的根节点。 输入数据 保证 ，新值和原始二叉搜索树中的任意节点值都不同。

\n\n

注意，可能存在多种有效的插入方式，只要树在插入后仍保持为二叉搜索树即可。 你可以返回 任意有效的结果 。

\n\n

 

\n\n

示例 1：

\n\"\"\n
\n输入：root = [4,2,7,1,3], val = 5\n输出：[4,2,7,1,3,5]\n解释：另一个满足题目要求可以通过的树是：\n\"\"\n
\n\n

示例 2：

\n\n
\n输入：root = [40,20,60,10,30,50,70], val = 25\n输出：[40,20,60,10,30,50,70,null,null,25]\n
\n\n

示例 3：

\n\n
\n输入：root = [4,2,7,1,3,null,null,null,null,null,null], val = 5\n输出：[4,2,7,1,3,5]\n
\n\n

 

\n\n

提示：

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0 : val)\n * this.left = (left===undefined ? null : left)\n * this.right = (right===undefined ? null : right)\n * }\n */\n/**\n * @param {TreeNode} root\n * @param {number} val\n * @return {TreeNode}\n */\nvar insertIntoBST = function(root, val) {\n\n};", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "/**\n * Definition for a binary tree node.\n * class TreeNode {\n * val: number\n * left: TreeNode | null\n * right: TreeNode | null\n * constructor(val?: number, left?: TreeNode | null, right?: TreeNode | null) {\n * this.val = (val===undefined ? 0 : val)\n * this.left = (left===undefined ? null : left)\n * this.right = (right===undefined ? null : right)\n * }\n * }\n */\n\nfunction insertIntoBST(root: TreeNode | null, val: number): TreeNode | null {\n \n};", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "/**\n * Definition for a binary tree node.\n * class TreeNode {\n * public $val = null;\n * public $left = null;\n * public $right = null;\n * function __construct($val = 0, $left = null, $right = null) {\n * $this->val = $val;\n * $this->left = $left;\n * $this->right = $right;\n * }\n * }\n */\nclass Solution {\n\n /**\n * @param TreeNode $root\n * @param Integer $val\n * @return TreeNode\n */\n function insertIntoBST($root, $val) {\n\n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n * public var val: Int\n * public var left: TreeNode?\n * public var right: TreeNode?\n * public init() { self.val = 0; self.left = nil; self.right = nil; }\n * public init(_ val: Int) { self.val = val; self.left = nil; self.right = nil; }\n * public init(_ val: Int, _ left: TreeNode?, _ right: TreeNode?) {\n * self.val = val\n * self.left = left\n * self.right = right\n * }\n * }\n */\nclass Solution {\n func insertIntoBST(_ root: TreeNode?, _ val: Int) -> TreeNode? {\n\n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "/**\n * Example:\n * var ti = TreeNode(5)\n * var v = ti.`val`\n * Definition for a binary tree node.\n * class TreeNode(var `val`: Int) {\n * var left: TreeNode? = null\n * var right: TreeNode? = null\n * }\n */\nclass Solution {\n fun insertIntoBST(root: TreeNode?, `val`: Int): TreeNode? {\n\n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Dart", "langSlug": "dart", "code": "/**\n * Definition for a binary tree node.\n * class TreeNode {\n * int val;\n * TreeNode? left;\n * TreeNode? right;\n * TreeNode([this.val = 0, this.left, this.right]);\n * }\n */\nclass Solution {\n TreeNode? insertIntoBST(TreeNode? root, int val) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "/**\n * Definition for a binary tree node.\n * type TreeNode struct {\n * Val int\n * Left *TreeNode\n * Right *TreeNode\n * }\n */\nfunc insertIntoBST(root *TreeNode, val int) *TreeNode {\n\n}", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "# Definition for a binary tree node.\n# class TreeNode\n# attr_accessor :val, :left, :right\n# def initialize(val = 0, left = nil, right = nil)\n# @val = val\n# @left = left\n# @right = right\n# end\n# end\n# @param {TreeNode} root\n# @param {Integer} val\n# @return {TreeNode}\ndef insert_into_bst(root, val)\n\nend", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "/**\n * Definition for a binary tree node.\n * class TreeNode(_value: Int = 0, _left: TreeNode = null, _right: TreeNode = null) {\n * var value: Int = _value\n * var left: TreeNode = _left\n * var right: TreeNode = _right\n * }\n */\nobject Solution {\n def insertIntoBST(root: TreeNode, `val`: Int): TreeNode = {\n\n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "// Definition for a binary tree node.\n// #[derive(Debug, PartialEq, Eq)]\n// pub struct TreeNode {\n// pub val: i32,\n// pub left: Option>>,\n// pub right: Option>>,\n// }\n//\n// impl TreeNode {\n// #[inline]\n// pub fn new(val: i32) -> Self {\n// TreeNode {\n// val,\n// left: None,\n// right: None\n// }\n// }\n// }\nuse std::rc::Rc;\nuse std::cell::RefCell;\nimpl Solution {\n pub fn insert_into_bst(root: Option>>, val: i32) -> Option>> {\n\n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "; Definition for a binary tree node.\n#|\n\n; val : integer?\n; left : (or/c tree-node? #f)\n; right : (or/c tree-node? #f)\n(struct tree-node\n (val left right) #:mutable #:transparent)\n\n; constructor\n(define (make-tree-node [val 0])\n (tree-node val #f #f))\n\n|#\n\n(define/contract (insert-into-bst root val)\n (-> (or/c tree-node? #f) exact-integer? (or/c tree-node? #f))\n )", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "%% Definition for a binary tree node.\n%%\n%% -record(tree_node, {val = 0 :: integer(),\n%% left = null :: 'null' | #tree_node{},\n%% right = null :: 'null' | #tree_node{}}).\n\n-spec insert_into_bst(Root :: #tree_node{} | null, Val :: integer()) -> #tree_node{} | null.\ninsert_into_bst(Root, Val) ->\n .", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "# Definition for a binary tree node.\n#\n# defmodule TreeNode do\n# @type t :: %__MODULE__{\n# val: integer,\n# left: TreeNode.t() | nil,\n# right: TreeNode.t() | nil\n# }\n# defstruct val: 0, left: nil, right: nil\n# end\n\ndefmodule Solution do\n @spec insert_into_bst(root :: TreeNode.t | nil, val :: integer) :: TreeNode.t | nil\n def insert_into_bst(root, val) do\n \n end\nend", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"217K\", \"totalSubmission\": \"307.9K\", \"totalAcceptedRaw\": 217044, \"totalSubmissionRaw\": 307880, \"acRate\": \"70.5%\"}", "hints": [], "solution": null, "status": null, "sampleTestCase": "[4,2,7,1,3]\n5", "metaData": "{\r\n \"name\": \"insertIntoBST\",\r\n \"params\": [\r\n {\r\n \"name\": \"root\",\r\n \"type\": \"TreeNode\"\r\n },\r\n {\r\n \"name\": \"val\",\r\n \"type\": \"integer\"\r\n }\r\n ],\r\n \"return\": {\r\n \"type\": \"TreeNode\"\r\n }\r\n}\r\n", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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