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            "title": "Design HashMap",
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            "content": "<p>Design a HashMap without using any built-in hash table libraries.</p>\n\n<p>Implement the <code>MyHashMap</code> class:</p>\n\n<ul>\n\t<li><code>MyHashMap()</code> initializes the object with an empty map.</li>\n\t<li><code>void put(int key, int value)</code> inserts a <code>(key, value)</code> pair into the HashMap. If the <code>key</code> already exists in the map, update the corresponding <code>value</code>.</li>\n\t<li><code>int get(int key)</code> returns the <code>value</code> to which the specified <code>key</code> is mapped, or <code>-1</code> if this map contains no mapping for the <code>key</code>.</li>\n\t<li><code>void remove(key)</code> removes the <code>key</code> and its corresponding <code>value</code> if the map contains the mapping for the <code>key</code>.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n[&quot;MyHashMap&quot;, &quot;put&quot;, &quot;put&quot;, &quot;get&quot;, &quot;get&quot;, &quot;put&quot;, &quot;get&quot;, &quot;remove&quot;, &quot;get&quot;]\n[[], [1, 1], [2, 2], [1], [3], [2, 1], [2], [2], [2]]\n<strong>Output</strong>\n[null, null, null, 1, -1, null, 1, null, -1]\n\n<strong>Explanation</strong>\nMyHashMap myHashMap = new MyHashMap();\nmyHashMap.put(1, 1); // The map is now [[1,1]]\nmyHashMap.put(2, 2); // The map is now [[1,1], [2,2]]\nmyHashMap.get(1);    // return 1, The map is now [[1,1], [2,2]]\nmyHashMap.get(3);    // return -1 (i.e., not found), The map is now [[1,1], [2,2]]\nmyHashMap.put(2, 1); // The map is now [[1,1], [2,1]] (i.e., update the existing value)\nmyHashMap.get(2);    // return 1, The map is now [[1,1], [2,1]]\nmyHashMap.remove(2); // remove the mapping for 2, The map is now [[1,1]]\nmyHashMap.get(2);    // return -1 (i.e., not found), The map is now [[1,1]]\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>0 &lt;= key, value &lt;= 10<sup>6</sup></code></li>\n\t<li>At most <code>10<sup>4</sup></code> calls will be made to <code>put</code>, <code>get</code>, and <code>remove</code>.</li>\n</ul>\n",
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                    "lang": "C++",
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                    "code": "class MyHashMap {\npublic:\n    MyHashMap() {\n        \n    }\n    \n    void put(int key, int value) {\n        \n    }\n    \n    int get(int key) {\n        \n    }\n    \n    void remove(int key) {\n        \n    }\n};\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * MyHashMap* obj = new MyHashMap();\n * obj->put(key,value);\n * int param_2 = obj->get(key);\n * obj->remove(key);\n */",
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                    "lang": "Java",
                    "langSlug": "java",
                    "code": "class MyHashMap {\n\n    public MyHashMap() {\n        \n    }\n    \n    public void put(int key, int value) {\n        \n    }\n    \n    public int get(int key) {\n        \n    }\n    \n    public void remove(int key) {\n        \n    }\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * MyHashMap obj = new MyHashMap();\n * obj.put(key,value);\n * int param_2 = obj.get(key);\n * obj.remove(key);\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Python",
                    "langSlug": "python",
                    "code": "class MyHashMap(object):\n\n    def __init__(self):\n        \n\n    def put(self, key, value):\n        \"\"\"\n        :type key: int\n        :type value: int\n        :rtype: None\n        \"\"\"\n        \n\n    def get(self, key):\n        \"\"\"\n        :type key: int\n        :rtype: int\n        \"\"\"\n        \n\n    def remove(self, key):\n        \"\"\"\n        :type key: int\n        :rtype: None\n        \"\"\"\n        \n\n\n# Your MyHashMap object will be instantiated and called as such:\n# obj = MyHashMap()\n# obj.put(key,value)\n# param_2 = obj.get(key)\n# obj.remove(key)",
                    "__typename": "CodeSnippetNode"
                },
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                    "lang": "Python3",
                    "langSlug": "python3",
                    "code": "class MyHashMap:\n\n    def __init__(self):\n        \n\n    def put(self, key: int, value: int) -> None:\n        \n\n    def get(self, key: int) -> int:\n        \n\n    def remove(self, key: int) -> None:\n        \n\n\n# Your MyHashMap object will be instantiated and called as such:\n# obj = MyHashMap()\n# obj.put(key,value)\n# param_2 = obj.get(key)\n# obj.remove(key)",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "C",
                    "langSlug": "c",
                    "code": "\n\n\ntypedef struct {\n    \n} MyHashMap;\n\n\nMyHashMap* myHashMapCreate() {\n    \n}\n\nvoid myHashMapPut(MyHashMap* obj, int key, int value) {\n  \n}\n\nint myHashMapGet(MyHashMap* obj, int key) {\n  \n}\n\nvoid myHashMapRemove(MyHashMap* obj, int key) {\n  \n}\n\nvoid myHashMapFree(MyHashMap* obj) {\n    \n}\n\n/**\n * Your MyHashMap struct will be instantiated and called as such:\n * MyHashMap* obj = myHashMapCreate();\n * myHashMapPut(obj, key, value);\n \n * int param_2 = myHashMapGet(obj, key);\n \n * myHashMapRemove(obj, key);\n \n * myHashMapFree(obj);\n*/",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "C#",
                    "langSlug": "csharp",
                    "code": "public class MyHashMap {\n\n    public MyHashMap() {\n        \n    }\n    \n    public void Put(int key, int value) {\n        \n    }\n    \n    public int Get(int key) {\n        \n    }\n    \n    public void Remove(int key) {\n        \n    }\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * MyHashMap obj = new MyHashMap();\n * obj.Put(key,value);\n * int param_2 = obj.Get(key);\n * obj.Remove(key);\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "\nvar MyHashMap = function() {\n    \n};\n\n/** \n * @param {number} key \n * @param {number} value\n * @return {void}\n */\nMyHashMap.prototype.put = function(key, value) {\n    \n};\n\n/** \n * @param {number} key\n * @return {number}\n */\nMyHashMap.prototype.get = function(key) {\n    \n};\n\n/** \n * @param {number} key\n * @return {void}\n */\nMyHashMap.prototype.remove = function(key) {\n    \n};\n\n/** \n * Your MyHashMap object will be instantiated and called as such:\n * var obj = new MyHashMap()\n * obj.put(key,value)\n * var param_2 = obj.get(key)\n * obj.remove(key)\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Ruby",
                    "langSlug": "ruby",
                    "code": "class MyHashMap\n    def initialize()\n        \n    end\n\n\n=begin\n    :type key: Integer\n    :type value: Integer\n    :rtype: Void\n=end\n    def put(key, value)\n        \n    end\n\n\n=begin\n    :type key: Integer\n    :rtype: Integer\n=end\n    def get(key)\n        \n    end\n\n\n=begin\n    :type key: Integer\n    :rtype: Void\n=end\n    def remove(key)\n        \n    end\n\n\nend\n\n# Your MyHashMap object will be instantiated and called as such:\n# obj = MyHashMap.new()\n# obj.put(key, value)\n# param_2 = obj.get(key)\n# obj.remove(key)",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Swift",
                    "langSlug": "swift",
                    "code": "\nclass MyHashMap {\n\n    init() {\n        \n    }\n    \n    func put(_ key: Int, _ value: Int) {\n        \n    }\n    \n    func get(_ key: Int) -> Int {\n        \n    }\n    \n    func remove(_ key: Int) {\n        \n    }\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * let obj = MyHashMap()\n * obj.put(key, value)\n * let ret_2: Int = obj.get(key)\n * obj.remove(key)\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Go",
                    "langSlug": "golang",
                    "code": "type MyHashMap struct {\n    \n}\n\n\nfunc Constructor() MyHashMap {\n    \n}\n\n\nfunc (this *MyHashMap) Put(key int, value int)  {\n    \n}\n\n\nfunc (this *MyHashMap) Get(key int) int {\n    \n}\n\n\nfunc (this *MyHashMap) Remove(key int)  {\n    \n}\n\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * obj := Constructor();\n * obj.Put(key,value);\n * param_2 := obj.Get(key);\n * obj.Remove(key);\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Scala",
                    "langSlug": "scala",
                    "code": "class MyHashMap() {\n\n    def put(key: Int, value: Int) {\n        \n    }\n\n    def get(key: Int): Int = {\n        \n    }\n\n    def remove(key: Int) {\n        \n    }\n\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * var obj = new MyHashMap()\n * obj.put(key,value)\n * var param_2 = obj.get(key)\n * obj.remove(key)\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Kotlin",
                    "langSlug": "kotlin",
                    "code": "class MyHashMap() {\n\n    fun put(key: Int, value: Int) {\n        \n    }\n\n    fun get(key: Int): Int {\n        \n    }\n\n    fun remove(key: Int) {\n        \n    }\n\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * var obj = MyHashMap()\n * obj.put(key,value)\n * var param_2 = obj.get(key)\n * obj.remove(key)\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Rust",
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                    "code": "struct MyHashMap {\n\n}\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 MyHashMap {\n\n    fn new() -> Self {\n        \n    }\n    \n    fn put(&self, key: i32, value: i32) {\n        \n    }\n    \n    fn get(&self, key: i32) -> i32 {\n        \n    }\n    \n    fn remove(&self, key: i32) {\n        \n    }\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * let obj = MyHashMap::new();\n * obj.put(key, value);\n * let ret_2: i32 = obj.get(key);\n * obj.remove(key);\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "PHP",
                    "langSlug": "php",
                    "code": "class MyHashMap {\n    /**\n     */\n    function __construct() {\n        \n    }\n  \n    /**\n     * @param Integer $key\n     * @param Integer $value\n     * @return NULL\n     */\n    function put($key, $value) {\n        \n    }\n  \n    /**\n     * @param Integer $key\n     * @return Integer\n     */\n    function get($key) {\n        \n    }\n  \n    /**\n     * @param Integer $key\n     * @return NULL\n     */\n    function remove($key) {\n        \n    }\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * $obj = MyHashMap();\n * $obj->put($key, $value);\n * $ret_2 = $obj->get($key);\n * $obj->remove($key);\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "class MyHashMap {\n    constructor() {\n\n    }\n\n    put(key: number, value: number): void {\n\n    }\n\n    get(key: number): number {\n\n    }\n\n    remove(key: number): void {\n\n    }\n}\n\n/**\n * Your MyHashMap object will be instantiated and called as such:\n * var obj = new MyHashMap()\n * obj.put(key,value)\n * var param_2 = obj.get(key)\n * obj.remove(key)\n */",
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                    "lang": "Racket",
                    "langSlug": "racket",
                    "code": "(define my-hash-map%\n  (class object%\n    (super-new)\n    (init-field)\n    \n    ; put : exact-integer? exact-integer? -> void?\n    (define/public (put key value)\n\n      )\n    ; get : exact-integer? -> exact-integer?\n    (define/public (get key)\n\n      )\n    ; remove : exact-integer? -> void?\n    (define/public (remove key)\n\n      )))\n\n;; Your my-hash-map% object will be instantiated and called as such:\n;; (define obj (new my-hash-map%))\n;; (send obj put key value)\n;; (define param_2 (send obj get key))\n;; (send obj remove key)",
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                    "lang": "Erlang",
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                    "code": "-spec my_hash_map_init_() -> any().\nmy_hash_map_init_() ->\n  .\n\n-spec my_hash_map_put(Key :: integer(), Value :: integer()) -> any().\nmy_hash_map_put(Key, Value) ->\n  .\n\n-spec my_hash_map_get(Key :: integer()) -> integer().\nmy_hash_map_get(Key) ->\n  .\n\n-spec my_hash_map_remove(Key :: integer()) -> any().\nmy_hash_map_remove(Key) ->\n  .\n\n\n%% Your functions will be called as such:\n%% my_hash_map_init_(),\n%% my_hash_map_put(Key, Value),\n%% Param_2 = my_hash_map_get(Key),\n%% my_hash_map_remove(Key),\n\n%% my_hash_map_init_ will be called before every test case, in which you can do some necessary initializations.",
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                    "code": "defmodule MyHashMap do\n  @spec init_() :: any\n  def init_() do\n\n  end\n\n  @spec put(key :: integer, value :: integer) :: any\n  def put(key, value) do\n\n  end\n\n  @spec get(key :: integer) :: integer\n  def get(key) do\n\n  end\n\n  @spec remove(key :: integer) :: any\n  def remove(key) do\n\n  end\nend\n\n# Your functions will be called as such:\n# MyHashMap.init_()\n# MyHashMap.put(key, value)\n# param_2 = MyHashMap.get(key)\n# MyHashMap.remove(key)\n\n# MyHashMap.init_ will be called before every test case, in which you can do some necessary initializations.",
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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://github.com/datastructures-js/queue\\\" target=\\\"_blank\\\">datastructures-js/queue</a>.</p>\"], \"ruby\": [\"Ruby\", \"<p><code>Ruby 3.1</code></p>\\r\\n\\r\\n<p>Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms</p>\"], \"swift\": [\"Swift\", \"<p><code>Swift 5.5.2</code>.</p>\"], \"golang\": [\"Go\", \"<p><code>Go 1.17.6</code>.</p>\\r\\n\\r\\n<p>Support <a href=\\\"https://godoc.org/github.com/emirpasic/gods\\\" target=\\\"_blank\\\">https://godoc.org/github.com/emirpasic/gods</a> library.</p>\"], \"python3\": [\"Python3\", \"<p><code>Python 3.10</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/3/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/3/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/3/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>\"], \"scala\": [\"Scala\", \"<p><code>Scala 2.13.7</code>.</p>\"], \"kotlin\": [\"Kotlin\", \"<p><code>Kotlin 1.3.10</code>.</p>\"], \"rust\": [\"Rust\", \"<p><code>Rust 1.58.1</code></p>\\r\\n\\r\\n<p>Supports <a href=\\\"https://crates.io/crates/rand\\\" target=\\\"_blank\\\">rand </a> v0.6\\u00a0from crates.io</p>\"], \"php\": [\"PHP\", \"<p><code>PHP 8.1</code>.</p>\\r\\n<p>With bcmath module</p>\"], \"typescript\": [\"Typescript\", \"<p><code>TypeScript 4.5.4, 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 ES2020 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\"], \"racket\": [\"Racket\", \"<p>Run with <code>Racket 8.3</code>.</p>\"], \"erlang\": [\"Erlang\", \"Erlang/OTP 24.2\"], \"elixir\": [\"Elixir\", \"Elixir 1.13.0 with Erlang/OTP 24.2\"]}",
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