"content":"<p>Given a n-ary tree, find its maximum depth.</p>\n\n<p>The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf node.</p>\n\n<p><em>Nary-Tree input serialization is represented in their level order traversal, each group of children is separated by the null value (See examples).</em></p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<p><img src=\"https://assets.leetcode.com/uploads/2018/10/12/narytreeexample.png\" style=\"width: 100%; max-width: 300px;\" /></p>\n\n<pre>\n<strong>Input:</strong> root = [1,null,3,2,4,null,5,6]\n<strong>Output:</strong> 3\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<p><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/11/08/sample_4_964.png\" style=\"width: 296px; height: 241px;\" /></p>\n\n<pre>\n<strong>Input:</strong> root = [1,null,2,3,4,5,null,null,6,7,null,8,null,9,10,null,null,11,null,12,null,13,null,null,14]\n<strong>Output:</strong> 5\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li>The total number of nodes is in the range <code>[0, 10<sup>4</sup>]</code>.</li>\n\t<li>The depth of the n-ary tree is less than or equal to <code>1000</code>.</li>\n</ul>\n",
"code":"/*\n// Definition for a Node.\nclass Node {\npublic:\n int val;\n vector<Node*> children;\n\n Node() {}\n\n Node(int _val) {\n val = _val;\n }\n\n Node(int _val, vector<Node*> _children) {\n val = _val;\n children = _children;\n }\n};\n*/\n\nclass Solution {\npublic:\n int maxDepth(Node* root) {\n \n }\n};",
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"lang":"Java",
"langSlug":"java",
"code":"/*\n// Definition for a Node.\nclass Node {\n public int val;\n public List<Node> children;\n\n public Node() {}\n\n public Node(int _val) {\n val = _val;\n }\n\n public Node(int _val, List<Node> _children) {\n val = _val;\n children = _children;\n }\n};\n*/\n\nclass Solution {\n public int maxDepth(Node root) {\n \n }\n}",
"code":"/**\n * Definition for a Node.\n * struct Node {\n * int val;\n * int numChildren;\n * struct Node** children;\n * };\n */\n\nint maxDepth(struct Node* root) {\n \n}",
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{
"lang":"C#",
"langSlug":"csharp",
"code":"/*\n// Definition for a Node.\npublic class Node {\n public int val;\n public IList<Node> children;\n\n public Node() {}\n\n public Node(int _val) {\n val = _val;\n }\n\n public Node(int _val, IList<Node> _children) {\n val = _val;\n children = _children;\n }\n}\n*/\n\npublic class Solution {\n public int MaxDepth(Node root) {\n \n }\n}",
"code":"# Definition for a Node.\n# class Node\n# attr_accessor :val, :children\n# def initialize(val)\n# @val = val\n# @children = []\n# end\n# end\n\n# @param {Node} root\n# @return {int}\ndef maxDepth(root)\n \nend",
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{
"lang":"Swift",
"langSlug":"swift",
"code":"/**\n * Definition for a Node.\n * public class Node {\n * public var val: Int\n * public var children: [Node]\n * public init(_ val: Int) {\n * self.val = val\n * self.children = []\n * }\n * }\n */\n\nclass Solution {\n func maxDepth(_ root: Node?) -> Int {\n \n }\n}",
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{
"lang":"Go",
"langSlug":"golang",
"code":"/**\n * Definition for a Node.\n * type Node struct {\n * Val int\n * Children []*Node\n * }\n */\n\nfunc maxDepth(root *Node) int {\n \n}",
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{
"lang":"Scala",
"langSlug":"scala",
"code":"/**\n * Definition for a Node.\n * class Node(var _value: Int) {\n * var value: Int = _value\n * var children: List[Node] = List()\n * }\n */\n\nobject Solution {\n def maxDepth(root: Node): Int = {\n \n }\n}",
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{
"lang":"Kotlin",
"langSlug":"kotlin",
"code":"/**\n * Definition for a Node.\n * class Node(var `val`: Int) {\n * var children: List<Node?> = listOf()\n * }\n */\n\nclass Solution {\n fun maxDepth(root: Node?): Int {\n \n }\n}",
"__typename":"CodeSnippetNode"
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"lang":"PHP",
"langSlug":"php",
"code":"/**\n * Definition for a Node.\n * class Node {\n * public $val = null;\n * public $children = null;\n * function __construct($val = 0) {\n * $this->val = $val;\n * $this->children = array();\n * }\n * }\n */\n\nclass Solution {\n /**\n * @param Node $root\n * @return integer\n */\n function maxDepth($root) {\n \t\n }\n}",
"envInfo":"{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 17 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level two optimization (<code>-O2</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\"], \"java\": [\"Java\", \"<p><code> OpenJDK 17 </code>. Java 8 features such as lambda expressions and stream API can be used. </p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n<p>Includes <code>Pair</code> class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.</p>\"], \"python\": [\"Python\", \"<p><code>Python 2.7.12</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/2/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/2/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/2/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. If you need more libraries, you can import it yourself.</p>\\r\\n\\r\\n<p>For Map/TreeMap data structure, you may use <a href=\\\"http://www.grantjenks.com/docs/sortedcontainers/\\\" target=\\\"_blank\\\">sortedcontainers</a> library.</p>\\r\\n\\r\\n<p>Note that Python 2.7 <a href=\\\"https://www.python.org/dev/peps/pep-0373/\\\" target=\\\"_blank\\\">will not be maintained past 2020</a>. For the latest Python, please choose Python3 instead.</p>\"], \"c\": [\"C\", \"<p>Compiled with <code>gcc 8.2</code> using the gnu99 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level one optimization (<code>-O1</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n\\r\\n<p>For hash table operations, you may use <a href=\\\"https://troydhanson.github.io/uthash/\\\" target=\\\"_blank\\\">uthash</a>. \\\"uthash.h\\\" is included by default. Below are some examples:</p>\\r\\n\\r\\n<p><b>1. Adding an item to a hash.</b>\\r\\n<pre>\\r\\nstruct hash_entry {\\r\\n int id; /* we'll use this field as the key */\\r\\n char name[10];\\r\\n UT_hash_handle hh; /* makes this structure hashable */\\r\\n};\\r\\n\\r\\nstruct hash_entry *users = NULL;\\r\\n\\r\\nvoid add_user(struct hash_entry *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>2. Looking up an item in a hash:</b>\\r\\n<pre>\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>3. Deleting an item in a hash:</b>\\r\\n<pre>\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n</pre>\\r\\n</p>\"], \"csharp\": [\"C#\", \"<p><a href=\\\"https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></p>\\r\\n\\r\\n<p>Your code is compiled with debug flag enabled (<code>/debug</code>).</p>\"], \"javascript\": [\"JavaScript\", \"<p><code>Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use <a href=\\\"https://github.com/datastructures-js/priority-queue\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and <a href=\\\"https:
