KnLfVT.json

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        "question": {
            "questionId": "1000482",
            "questionFrontendId": "LCP 67",
            "categoryTitle": "Algorithms",
            "boundTopicId": 1874937,
            "title": "装饰树",
            "titleSlug": "KnLfVT",
            "content": "",
            "translatedTitle": "装饰树",
            "translatedContent": "力扣嘉年华上的 DIY 手工展位准备了一棵缩小版的 **二叉** 装饰树 `root` 和灯饰，你需要将灯饰逐一插入装饰树中，要求如下：\r\n\r\n- 完成装饰的二叉树根结点与 `root` 的根结点值相同\r\n- 若一个节点拥有父节点，则在该节点和他的父节点之间插入一个灯饰（即插入一个值为 `-1` 的节点）。具体地：\r\n    - 在一个 父节点 x 与其左子节点 y 之间添加 -1 节点， 节点 -1、节点 y 为各自父节点的左子节点，\r\n    - 在一个 父节点 x 与其右子节点 y 之间添加 -1 节点， 节点 -1、节点 y 为各自父节点的右子节点，\r\n    \r\n现给定二叉树的根节点 `root` ，请返回完成装饰后的树的根节点。\r\n**示例 1：**\r\n>输入：\r\n>`root = [7,5,6]`\r\n>\r\n>输出：`[7,-1,-1,5,null,null,6]`\r\n>\r\n>解释：如下图所示，\r\n>![image.png](https://pic.leetcode-cn.com/1663575757-yRLGaq-image.png){:width=400px}\r\n\r\n**示例 2：**\r\n>输入：\r\n>`root = [3,1,7,3,8,null,4]`\r\n>\r\n>输出：`[3,-1,-1,1,null,null,7,-1,-1,null,-1,3,null,null,8,null,4]`\r\n>\r\n>解释：如下图所示\r\n![image.png](https://pic.leetcode-cn.com/1663577920-sjrAYH-image.png){:width=500px}\r\n\r\n**提示：**\r\n>`0 <= root.Val <= 1000`\r\n>`root` 节点数量范围为 `[1, 10^5]`",
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                    "lang": "C++",
                    "langSlug": "cpp",
                    "code": "/**\n * Definition for a binary tree node.\n * struct TreeNode {\n *     int val;\n *     TreeNode *left;\n *     TreeNode *right;\n *     TreeNode() : val(0), left(nullptr), right(nullptr) {}\n *     TreeNode(int x) : val(x), left(nullptr), right(nullptr) {}\n *     TreeNode(int x, TreeNode *left, TreeNode *right) : val(x), left(left), right(right) {}\n * };\n */\nclass Solution {\npublic:\n    TreeNode* expandBinaryTree(TreeNode* root) {\n\n    }\n};",
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                {
                    "lang": "Java",
                    "langSlug": "java",
                    "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n *     int val;\n *     TreeNode left;\n *     TreeNode right;\n *     TreeNode() {}\n *     TreeNode(int val) { this.val = val; }\n *     TreeNode(int val, TreeNode left, TreeNode right) {\n *         this.val = val;\n *         this.left = left;\n *         this.right = right;\n *     }\n * }\n */\nclass Solution {\n    public TreeNode expandBinaryTree(TreeNode root) {\n\n    }\n}",
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                },
                {
                    "lang": "Python",
                    "langSlug": "python",
                    "code": "# Definition for a binary tree node.\n# class TreeNode(object):\n#     def __init__(self, val=0, left=None, right=None):\n#         self.val = val\n#         self.left = left\n#         self.right = right\nclass Solution(object):\n    def expandBinaryTree(self, root):\n        \"\"\"\n        :type root: Optional[TreeNode]\n        :rtype: Optional[TreeNode]\n        \"\"\"",
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                {
                    "lang": "Python3",
                    "langSlug": "python3",
                    "code": "# Definition for a binary tree node.\n# class TreeNode:\n#     def __init__(self, val=0, left=None, right=None):\n#         self.val = val\n#         self.left = left\n#         self.right = right\nclass Solution:\n    def expandBinaryTree(self, root: Optional[TreeNode]) -> Optional[TreeNode]:",
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                {
                    "lang": "C",
                    "langSlug": "c",
                    "code": "/**\n * Definition for a binary tree node.\n * struct TreeNode {\n *     int val;\n *     struct TreeNode *left;\n *     struct TreeNode *right;\n * };\n */\n\n\nstruct TreeNode* expandBinaryTree(struct TreeNode* root){\n\n}",
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                    "lang": "C#",
                    "langSlug": "csharp",
                    "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n *     public int val;\n *     public TreeNode left;\n *     public TreeNode right;\n *     public TreeNode(int val=0, TreeNode left=null, TreeNode right=null) {\n *         this.val = val;\n *         this.left = left;\n *         this.right = right;\n *     }\n * }\n */\npublic class Solution {\n    public TreeNode ExpandBinaryTree(TreeNode root) {\n\n    }\n}",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * Definition for a binary tree node.\n * function TreeNode(val, left, right) {\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 * @param {TreeNode} root\n * @return {TreeNode}\n */\nvar expandBinaryTree = function(root) {\n\n};",
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                {
                    "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# @return {TreeNode}\ndef expand_binary_tree(root)\n\nend",
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                {
                    "lang": "Swift",
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                    "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 expandBinaryTree(_ root: TreeNode?) -> TreeNode? {\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 expandBinaryTree(root *TreeNode) *TreeNode {\n\n}",
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                    "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 expandBinaryTree(root: TreeNode): TreeNode = {\n\n    }\n}",
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                {
                    "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 expandBinaryTree(root: TreeNode?): TreeNode? {\n\n    }\n}",
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                {
                    "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<Rc<RefCell<TreeNode>>>,\n//   pub right: Option<Rc<RefCell<TreeNode>>>,\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 expand_binary_tree(root: Option<Rc<RefCell<TreeNode>>>) -> Option<Rc<RefCell<TreeNode>>> {\n\n    }\n}",
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                {
                    "lang": "PHP",
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                    "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 $root\n     * @return TreeNode\n     */\n    function expandBinaryTree($root) {\n\n    }\n}",
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                    "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 expandBinaryTree(root: TreeNode | null): TreeNode | null {\n\n};",
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                    "lang": "Racket",
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                    "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 (expand-binary-tree root)\n  (-> (or/c tree-node? #f) (or/c tree-node? #f))\n\n  )",
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                    "lang": "Erlang",
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                    "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 expand_binary_tree(Root :: #tree_node{} | null) -> #tree_node{} | null.\nexpand_binary_tree(Root) ->\n  .",
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                    "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 expand_binary_tree(root :: TreeNode.t | nil) :: TreeNode.t | nil\n  def expand_binary_tree(root) do\n\n  end\nend",
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