leetcode-problemset/leetcode-cn/originData/all-nodes-distance-k-in-binary-tree.json

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        "question": {
            "questionId": "893",
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            "categoryTitle": "Algorithms",
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            "title": "All Nodes Distance K in Binary Tree",
            "titleSlug": "all-nodes-distance-k-in-binary-tree",
            "content": "<p>Given the <code>root</code> of a binary tree, the value of a target node <code>target</code>, and an integer <code>k</code>, return <em>an array of the values of all nodes that have a distance </em><code>k</code><em> from the target node.</em></p>\n\n<p>You can return the answer in <strong>any order</strong>.</p>\n\n<p>&nbsp;</p>\n<p><strong class=\"example\">Example 1:</strong></p>\n<img alt=\"\" src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/06/28/sketch0.png\" style=\"width: 500px; height: 429px;\" />\n<pre>\n<strong>Input:</strong> root = [3,5,1,6,2,0,8,null,null,7,4], target = 5, k = 2\n<strong>Output:</strong> [7,4,1]\nExplanation: The nodes that are a distance 2 from the target node (with value 5) have values 7, 4, and 1.\n</pre>\n\n<p><strong class=\"example\">Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> root = [1], target = 1, k = 3\n<strong>Output:</strong> []\n</pre>\n\n<p>&nbsp;</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, 500]</code>.</li>\n\t<li><code>0 &lt;= Node.val &lt;= 500</code></li>\n\t<li>All the values <code>Node.val</code> are <strong>unique</strong>.</li>\n\t<li><code>target</code> is the value of one of the nodes in the tree.</li>\n\t<li><code>0 &lt;= k &lt;= 1000</code></li>\n</ul>\n",
            "translatedTitle": "二叉树中所有距离为 K 的结点",
            "translatedContent": "<p>给定一个二叉树（具有根结点&nbsp;<code>root</code>），&nbsp;一个目标结点&nbsp;<code>target</code>&nbsp;，和一个整数值 <code>k</code> 。</p>\n\n<p>返回到目标结点 <code>target</code> 距离为 <code>k</code> 的所有结点的值的列表。 答案可以以 <strong>任何顺序</strong> 返回。</p>\n\n<p>&nbsp;</p>\n\n<ol>\n</ol>\n\n<p><strong>示例 1：</strong></p>\n\n<p><img src=\"https://s3-lc-upload.s3.amazonaws.com/uploads/2018/06/28/sketch0.png\" style=\"height: 429px; width: 500px;\" /></p>\n\n<pre>\n<strong>输入：</strong>root = [3,5,1,6,2,0,8,null,null,7,4], target = 5, k = 2\n<strong>输出：</strong>[7,4,1]\n<strong>解释：</strong>所求结点为与目标结点（值为 5）距离为 2 的结点，值分别为 7，4，以及 1\n</pre>\n\n<p><strong>示例 2:</strong></p>\n\n<pre>\n<strong>输入:</strong> root = [1], target = 1, k = 3\n<strong>输出:</strong> []\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示:</strong></p>\n\n<ul>\n\t<li>节点数在&nbsp;<code>[1, 500]</code>&nbsp;范围内</li>\n\t<li><code>0 &lt;= Node.val &lt;= 500</code></li>\n\t<li><code>Node.val</code>&nbsp;中所有值 <strong>不同</strong></li>\n\t<li>目标结点&nbsp;<code>target</code>&nbsp;是树上的结点。</li>\n\t<li><code>0 &lt;= k &lt;= 1000</code></li>\n</ul>\n\n<p>&nbsp;</p>\n",
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                    "code": "/**\n * Definition for a binary tree node.\n * class TreeNode(var `val`: Int = 0) {\n *     var left: TreeNode? = null\n *     var right: TreeNode? = null\n * }\n */\nclass Solution {\n    fun distanceK(root: TreeNode?, target: TreeNode?, k: Int): List<Int> {\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 distanceK(root *TreeNode, target *TreeNode, k int) []int {\n    \n}",
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