mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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190 lines
28 KiB
JSON
190 lines
28 KiB
JSON
{
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"questionId": "669",
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"questionFrontendId": "669",
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"categoryTitle": "Algorithms",
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"boundTopicId": 1594,
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"title": "Trim a Binary Search Tree",
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"titleSlug": "trim-a-binary-search-tree",
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"content": "<p>Given the <code>root</code> of a binary search tree and the lowest and highest boundaries as <code>low</code> and <code>high</code>, trim the tree so that all its elements lies in <code>[low, high]</code>. Trimming the tree should <strong>not</strong> change the relative structure of the elements that will remain in the tree (i.e., any node's descendant should remain a descendant). It can be proven that there is a <strong>unique answer</strong>.</p>\n\n<p>Return <em>the root of the trimmed binary search tree</em>. Note that the root may change depending on the given bounds.</p>\n\n<p> </p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/09/trim1.jpg\" style=\"width: 450px; height: 126px;\" />\n<pre>\n<strong>Input:</strong> root = [1,0,2], low = 1, high = 2\n<strong>Output:</strong> [1,null,2]\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/09/trim2.jpg\" style=\"width: 450px; height: 277px;\" />\n<pre>\n<strong>Input:</strong> root = [3,0,4,null,2,null,null,1], low = 1, high = 3\n<strong>Output:</strong> [3,2,null,1]\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>The number of nodes in the tree is in the range <code>[1, 10<sup>4</sup>]</code>.</li>\n\t<li><code>0 <= Node.val <= 10<sup>4</sup></code></li>\n\t<li>The value of each node in the tree is <strong>unique</strong>.</li>\n\t<li><code>root</code> is guaranteed to be a valid binary search tree.</li>\n\t<li><code>0 <= low <= high <= 10<sup>4</sup></code></li>\n</ul>\n",
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"translatedTitle": "修剪二叉搜索树",
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"translatedContent": "<p>给你二叉搜索树的根节点 <code>root</code> ，同时给定最小边界<code>low</code> 和最大边界 <code>high</code>。通过修剪二叉搜索树，使得所有节点的值在<code>[low, high]</code>中。修剪树 <strong>不应该</strong> 改变保留在树中的元素的相对结构 (即，如果没有被移除，原有的父代子代关系都应当保留)。 可以证明，存在 <strong>唯一的答案</strong> 。</p>\n\n<p>所以结果应当返回修剪好的二叉搜索树的新的根节点。注意，根节点可能会根据给定的边界发生改变。</p>\n\n<p> </p>\n\n<p><strong>示例 1：</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/09/trim1.jpg\" style=\"height: 126px; width: 450px;\" />\n<pre>\n<strong>输入：</strong>root = [1,0,2], low = 1, high = 2\n<strong>输出：</strong>[1,null,2]\n</pre>\n\n<p><strong>示例 2：</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/09/trim2.jpg\" style=\"height: 277px; width: 450px;\" />\n<pre>\n<strong>输入：</strong>root = [3,0,4,null,2,null,null,1], low = 1, high = 3\n<strong>输出：</strong>[3,2,null,1]\n</pre>\n\n<p> </p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li>树中节点数在范围 <code>[1, 10<sup>4</sup>]</code> 内</li>\n\t<li><code>0 <= Node.val <= 10<sup>4</sup></code></li>\n\t<li>树中每个节点的值都是 <strong>唯一</strong> 的</li>\n\t<li>题目数据保证输入是一棵有效的二叉搜索树</li>\n\t<li><code>0 <= low <= high <= 10<sup>4</sup></code></li>\n</ul>\n",
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"name": "Depth-First Search",
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"translatedName": "深度优先搜索",
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"name": "Binary Search Tree",
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"translatedName": "二叉搜索树",
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"name": "Binary Tree",
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"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* trimBST(TreeNode* root, int low, int high) {\n\n }\n};",
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"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 trimBST(self, root, low, high):\n \"\"\"\n :type root: TreeNode\n :type low: int\n :type high: int\n :rtype: TreeNode\n \"\"\"\n ",
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"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 trimBST(self, root: Optional[TreeNode], low: int, high: int) -> Optional[TreeNode]:",
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"code": "/**\n * Definition for a binary tree node.\n * struct TreeNode {\n * int val;\n * struct TreeNode *left;\n * struct TreeNode *right;\n * };\n */\nstruct TreeNode* trimBST(struct TreeNode* root, int low, int high) {\n \n}",
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"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 TrimBST(TreeNode root, int low, int high) {\n\n }\n}",
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"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 * @param {number} low\n * @param {number} high\n * @return {TreeNode}\n */\nvar trimBST = function(root, low, high) {\n\n};",
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"lang": "TypeScript",
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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 trimBST(root: TreeNode | null, low: number, high: number): TreeNode | null {\n \n};",
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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 * @param Integer $low\n * @param Integer $high\n * @return TreeNode\n */\n function trimBST($root, $low, $high) {\n\n }\n}",
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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 trimBST(_ root: TreeNode?, _ low: Int, _ high: Int) -> TreeNode? {\n\n }\n}",
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"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 trimBST(root: TreeNode?, low: Int, high: Int): TreeNode? {\n\n }\n}",
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"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? trimBST(TreeNode? root, int low, int high) {\n \n }\n}",
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"code": "/**\n * Definition for a binary tree node.\n * type TreeNode struct {\n * Val int\n * Left *TreeNode\n * Right *TreeNode\n * }\n */\nfunc trimBST(root *TreeNode, low int, high int) *TreeNode {\n\n}",
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"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} low\n# @param {Integer} high\n# @return {TreeNode}\ndef trim_bst(root, low, high)\n\nend",
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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 trimBST(root: TreeNode, low: Int, high: Int): TreeNode = {\n\n }\n}",
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"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 trim_bst(root: Option<Rc<RefCell<TreeNode>>>, low: i32, high: i32) -> Option<Rc<RefCell<TreeNode>>> {\n\n }\n}",
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"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 trim_bst(root :: TreeNode.t | nil, low :: integer, high :: integer) :: TreeNode.t | nil\n def trim_bst(root, low, high) do\n \n end\nend",
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