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            "title": "Serialize and Deserialize Binary Tree",
            "titleSlug": "serialize-and-deserialize-binary-tree",
            "content": "<p>Serialization is the process of converting a data structure or object into a sequence of bits so that it can be stored in a file or memory buffer, or transmitted across a network connection link to be reconstructed later in the same or another computer environment.</p>\n\n<p>Design an algorithm to serialize and deserialize a binary tree. There is no restriction on how your serialization/deserialization algorithm should work. You just need to ensure that a binary tree can be serialized to a string and this string can be deserialized to the original tree structure.</p>\n\n<p><strong>Clarification:</strong> The input/output format is the same as <a href=\"/faq/#binary-tree\" target=\"_blank\">how LeetCode serializes a binary tree</a>. You do not necessarily need to follow this format, so please be creative and come up with different approaches yourself.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n<img alt=\"\" src=\"https://assets.leetcode.com/uploads/2020/09/15/serdeser.jpg\" style=\"width: 442px; height: 324px;\" />\n<pre>\n<strong>Input:</strong> root = [1,2,3,null,null,4,5]\n<strong>Output:</strong> [1,2,3,null,null,4,5]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> root = []\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>[0, 10<sup>4</sup>]</code>.</li>\n\t<li><code>-1000 &lt;= Node.val &lt;= 1000</code></li>\n</ul>\n",
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            "categoryTitle": "Algorithms",
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                    "name": "String",
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                    "name": "Tree",
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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(int x) : val(x), left(NULL), right(NULL) {}\n * };\n */\nclass Codec {\npublic:\n\n    // Encodes a tree to a single string.\n    string serialize(TreeNode* root) {\n        \n    }\n\n    // Decodes your encoded data to tree.\n    TreeNode* deserialize(string data) {\n        \n    }\n};\n\n// Your Codec object will be instantiated and called as such:\n// Codec ser, deser;\n// TreeNode* ans = deser.deserialize(ser.serialize(root));",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Java",
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                    "code": "/**\n * Definition for a binary tree node.\n * public class TreeNode {\n *     int val;\n *     TreeNode left;\n *     TreeNode right;\n *     TreeNode(int x) { val = x; }\n * }\n */\npublic class Codec {\n\n    // Encodes a tree to a single string.\n    public String serialize(TreeNode root) {\n        \n    }\n\n    // Decodes your encoded data to tree.\n    public TreeNode deserialize(String data) {\n        \n    }\n}\n\n// Your Codec object will be instantiated and called as such:\n// Codec ser = new Codec();\n// Codec deser = new Codec();\n// TreeNode ans = deser.deserialize(ser.serialize(root));",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Python",
                    "langSlug": "python",
                    "code": "# Definition for a binary tree node.\n# class TreeNode(object):\n#     def __init__(self, x):\n#         self.val = x\n#         self.left = None\n#         self.right = None\n\nclass Codec:\n\n    def serialize(self, root):\n        \"\"\"Encodes a tree to a single string.\n        \n        :type root: TreeNode\n        :rtype: str\n        \"\"\"\n        \n\n    def deserialize(self, data):\n        \"\"\"Decodes your encoded data to tree.\n        \n        :type data: str\n        :rtype: TreeNode\n        \"\"\"\n        \n\n# Your Codec object will be instantiated and called as such:\n# ser = Codec()\n# deser = Codec()\n# ans = deser.deserialize(ser.serialize(root))",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Python3",
                    "langSlug": "python3",
                    "code": "# Definition for a binary tree node.\n# class TreeNode(object):\n#     def __init__(self, x):\n#         self.val = x\n#         self.left = None\n#         self.right = None\n\nclass Codec:\n\n    def serialize(self, root):\n        \"\"\"Encodes a tree to a single string.\n        \n        :type root: TreeNode\n        :rtype: str\n        \"\"\"\n        \n\n    def deserialize(self, data):\n        \"\"\"Decodes your encoded data to tree.\n        \n        :type data: str\n        :rtype: TreeNode\n        \"\"\"\n        \n\n# Your Codec object will be instantiated and called as such:\n# ser = Codec()\n# deser = Codec()\n# ans = deser.deserialize(ser.serialize(root))",
                    "__typename": "CodeSnippetNode"
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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/** Encodes a tree to a single string. */\nchar* serialize(struct TreeNode* root) {\n    \n}\n\n/** Decodes your encoded data to tree. */\nstruct TreeNode* deserialize(char* data) {\n    \n}\n\n// Your functions will be called as such:\n// char* data = serialize(root);\n// deserialize(data);",
                    "__typename": "CodeSnippetNode"
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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 x) { val = x; }\n * }\n */\npublic class Codec {\n\n    // Encodes a tree to a single string.\n    public string serialize(TreeNode root) {\n        \n    }\n\n    // Decodes your encoded data to tree.\n    public TreeNode deserialize(string data) {\n        \n    }\n}\n\n// Your Codec object will be instantiated and called as such:\n// Codec ser = new Codec();\n// Codec deser = new Codec();\n// TreeNode ans = deser.deserialize(ser.serialize(root));",
                    "__typename": "CodeSnippetNode"
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                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * Definition for a binary tree node.\n * function TreeNode(val) {\n *     this.val = val;\n *     this.left = this.right = null;\n * }\n */\n\n/**\n * Encodes a tree to a single string.\n *\n * @param {TreeNode} root\n * @return {string}\n */\nvar serialize = function(root) {\n    \n};\n\n/**\n * Decodes your encoded data to tree.\n *\n * @param {string} data\n * @return {TreeNode}\n */\nvar deserialize = function(data) {\n    \n};\n\n/**\n * Your functions will be called as such:\n * deserialize(serialize(root));\n */",
                    "__typename": "CodeSnippetNode"
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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)\n#         @val = val\n#         @left, @right = nil, nil\n#     end\n# end\n\n# Encodes a tree to a single string.\n#\n# @param {TreeNode} root\n# @return {string}\ndef serialize(root)\n    \nend\n\n# Decodes your encoded data to tree.\n#\n# @param {string} data\n# @return {TreeNode}\ndef deserialize(data)\n    \nend\n\n\n# Your functions will be called as such:\n# deserialize(serialize(data))",
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                    "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(_ val: Int) {\n *         self.val = val\n *         self.left = nil\n *         self.right = nil\n *     }\n * }\n */\n\nclass Codec {\n    func serialize(_ root: TreeNode?) -> String {\n        \n    }\n    \n    func deserialize(_ data: String) -> TreeNode? {\n        \n    }\n}\n\n// Your Codec object will be instantiated and called as such:\n// var ser = Codec()\n// var deser = Codec()\n// deser.deserialize(ser.serialize(root))",
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                    "lang": "Go",
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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 */\n\ntype Codec struct {\n    \n}\n\nfunc Constructor() Codec {\n    \n}\n\n// Serializes a tree to a single string.\nfunc (this *Codec) serialize(root *TreeNode) string {\n    \n}\n\n// Deserializes your encoded data to tree.\nfunc (this *Codec) deserialize(data string) *TreeNode {    \n    \n}\n\n\n/**\n * Your Codec object will be instantiated and called as such:\n * ser := Constructor();\n * deser := Constructor();\n * data := ser.serialize(root);\n * ans := deser.deserialize(data);\n */",
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                    "code": "/**\n * Definition for a binary tree node.\n * class TreeNode(var _value: Int) {\n *   var value: Int = _value\n *   var left: TreeNode = null\n *   var right: TreeNode = null\n * }\n */\n\nclass Codec {\n    // Encodes a list of strings to a single string.\n    def serialize(root: TreeNode): String = {\n        \n    }\n    \n    // Decodes a single string to a list of strings.\n    def deserialize(data: String): TreeNode = {\n        \n    }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * var ser = new Codec()\n * var deser = new Codec()\n * val s = ser.serialize(root)\n * val ans = deser.deserialize(s)\n */",
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                    "code": "/**\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 */\n\nclass Codec() {\n\t// Encodes a URL to a shortened URL.\n    fun serialize(root: TreeNode?): String {\n        \n    }\n\n    // Decodes your encoded data to tree.\n    fun deserialize(data: String): TreeNode? {\n        \n    }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * var ser = Codec()\n * var deser = Codec()\n * var data = ser.serialize(longUrl)\n * var ans = deser.deserialize(data)\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;\nstruct Codec {\n\t\n}\n\n/** \n * `&self` means the method takes an immutable reference.\n * If you need a mutable reference, change it to `&mut self` instead.\n */\nimpl Codec {\n    fn new() -> Self {\n        \n    }\n\n    fn serialize(&self, root: Option<Rc<RefCell<TreeNode>>>) -> String {\n        \n    }\n\t\n    fn deserialize(&self, data: String) -> Option<Rc<RefCell<TreeNode>>> {\n        \n    }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * let obj = Codec::new();\n * let data: String = obj.serialize(strs);\n * let ans: Option<Rc<RefCell<TreeNode>>> = obj.deserialize(data);\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 $right = null;\n *     function __construct($value) { $this->val = $value; }\n * }\n */\n\nclass Codec {\n    function __construct() {\n        \n    }\n  \n    /**\n     * @param TreeNode $root\n     * @return String\n     */\n    function serialize($root) {\n        \n    }\n  \n    /**\n     * @param String $data\n     * @return TreeNode\n     */\n    function deserialize($data) {\n        \n    }\n}\n\n/**\n * Your Codec object will be instantiated and called as such:\n * $ser = Codec();\n * $deser = Codec();\n * $data = $ser->serialize($root);\n * $ans = $deser->deserialize($data);\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\n/*\n * Encodes a tree to a single string.\n */\nfunction serialize(root: TreeNode | null): string {\n\n};\n\n/*\n * Decodes your encoded data to tree.\n */\nfunction deserialize(data: string): TreeNode | null {\n\n};\n\n\n/**\n * Your functions will be called as such:\n * deserialize(serialize(root));\n */",
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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. 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