leetcode-problemset/leetcode-cn/originData/FortPu.json

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        "question": {
            "questionId": "1000267",
            "questionFrontendId": "剑指 Offer II 030",
            "categoryTitle": "LCOF2",
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            "title": "插入、删除和随机访问都是 O(1) 的容器",
            "titleSlug": "FortPu",
            "content": "<p>&nbsp;</p>\n\n<p>English description is not available for the problem. Please switch to Chinese.</p>\n",
            "translatedTitle": "插入、删除和随机访问都是 O(1) 的容器",
            "translatedContent": "<p>设计一个支持在<em>平均&nbsp;</em>时间复杂度 <strong>O(1)</strong>&nbsp;下，执行以下操作的数据结构：</p>\n\n<ul>\n\t<li><code>insert(val)</code>：当元素 <code>val</code> 不存在时返回 <code>true</code>&nbsp;，并向集合中插入该项，否则返回 <code>false</code> 。</li>\n\t<li><code>remove(val)</code>：当元素 <code>val</code> 存在时返回 <code>true</code>&nbsp;，并从集合中移除该项，否则返回 <code>false</code>&nbsp;。</li>\n\t<li><code>getRandom</code>：随机返回现有集合中的一项。每个元素应该有&nbsp;<strong>相同的概率&nbsp;</strong>被返回。</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 :</strong></p>\n\n<pre>\n<strong>输入: </strong>inputs = [&quot;RandomizedSet&quot;, &quot;insert&quot;, &quot;remove&quot;, &quot;insert&quot;, &quot;getRandom&quot;, &quot;remove&quot;, &quot;insert&quot;, &quot;getRandom&quot;]\n[[], [1], [2], [2], [], [1], [2], []]\n<strong>输出: </strong>[null, true, false, true, 2, true, false, 2]\n<strong>解释:\n</strong>RandomizedSet randomSet = new RandomizedSet();  // 初始化一个空的集合\nrandomSet.insert(1); // 向集合中插入 1 ， 返回 true 表示 1 被成功地插入\n\nrandomSet.remove(2); // 返回 false，表示集合中不存在 2 \n\nrandomSet.insert(2); // 向集合中插入 2 返回 true ，集合现在包含 [1,2] \n\nrandomSet.getRandom(); // getRandom 应随机返回 1 或 2 \n  \nrandomSet.remove(1); // 从集合中移除 1 返回 true 。集合现在包含 [2] \n\nrandomSet.insert(2); // 2 已在集合中，所以返回 false \n\nrandomSet.getRandom(); // 由于 2 是集合中唯一的数字，getRandom 总是返回 2 \n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong><meta charset=\"UTF-8\" /></p>\n\n<ul>\n\t<li><code>-2<sup>31</sup>&nbsp;&lt;= val &lt;= 2<sup>31</sup>&nbsp;- 1</code></li>\n\t<li>最多进行<code> 2 * 10<sup>5</sup></code> 次&nbsp;<code>insert</code> ， <code>remove</code> 和 <code>getRandom</code> 方法调用</li>\n\t<li>当调用&nbsp;<code>getRandom</code> 方法时，集合中至少有一个元素</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><meta charset=\"UTF-8\" />注意：本题与主站 380&nbsp;题相同：<a href=\"https://leetcode-cn.com/problems/insert-delete-getrandom-o1/\">https://leetcode-cn.com/problems/insert-delete-getrandom-o1/</a></p>\n",
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                    "code": "class RandomizedSet {\npublic:\n    /** Initialize your data structure here. */\n    RandomizedSet() {\n\n    }\n    \n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    bool insert(int val) {\n\n    }\n    \n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    bool remove(int val) {\n\n    }\n    \n    /** Get a random element from the set. */\n    int getRandom() {\n\n    }\n};\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * RandomizedSet* obj = new RandomizedSet();\n * bool param_1 = obj->insert(val);\n * bool param_2 = obj->remove(val);\n * int param_3 = obj->getRandom();\n */",
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                    "code": "class RandomizedSet {\n\n    /** Initialize your data structure here. */\n    public RandomizedSet() {\n\n    }\n    \n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    public boolean insert(int val) {\n\n    }\n    \n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    public boolean remove(int val) {\n\n    }\n    \n    /** Get a random element from the set. */\n    public int getRandom() {\n\n    }\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * RandomizedSet obj = new RandomizedSet();\n * boolean param_1 = obj.insert(val);\n * boolean param_2 = obj.remove(val);\n * int param_3 = obj.getRandom();\n */",
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                    "code": "class RandomizedSet(object):\n\n    def __init__(self):\n        \"\"\"\n        Initialize your data structure here.\n        \"\"\"\n\n\n    def insert(self, val):\n        \"\"\"\n        Inserts a value to the set. Returns true if the set did not already contain the specified element.\n        :type val: int\n        :rtype: bool\n        \"\"\"\n\n\n    def remove(self, val):\n        \"\"\"\n        Removes a value from the set. Returns true if the set contained the specified element.\n        :type val: int\n        :rtype: bool\n        \"\"\"\n\n\n    def getRandom(self):\n        \"\"\"\n        Get a random element from the set.\n        :rtype: int\n        \"\"\"\n\n\n\n# Your RandomizedSet object will be instantiated and called as such:\n# obj = RandomizedSet()\n# param_1 = obj.insert(val)\n# param_2 = obj.remove(val)\n# param_3 = obj.getRandom()",
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                    "code": "class RandomizedSet:\n\n    def __init__(self):\n        \"\"\"\n        Initialize your data structure here.\n        \"\"\"\n\n\n    def insert(self, val: int) -> bool:\n        \"\"\"\n        Inserts a value to the set. Returns true if the set did not already contain the specified element.\n        \"\"\"\n\n\n    def remove(self, val: int) -> bool:\n        \"\"\"\n        Removes a value from the set. Returns true if the set contained the specified element.\n        \"\"\"\n\n\n    def getRandom(self) -> int:\n        \"\"\"\n        Get a random element from the set.\n        \"\"\"\n\n\n\n# Your RandomizedSet object will be instantiated and called as such:\n# obj = RandomizedSet()\n# param_1 = obj.insert(val)\n# param_2 = obj.remove(val)\n# param_3 = obj.getRandom()",
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                    "code": "\n\n\ntypedef struct {\n\n} RandomizedSet;\n\n/** Initialize your data structure here. */\n\nRandomizedSet* randomizedSetCreate() {\n\n}\n\n/** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\nbool randomizedSetInsert(RandomizedSet* obj, int val) {\n\n}\n\n/** Removes a value from the set. Returns true if the set contained the specified element. */\nbool randomizedSetRemove(RandomizedSet* obj, int val) {\n\n}\n\n/** Get a random element from the set. */\nint randomizedSetGetRandom(RandomizedSet* obj) {\n\n}\n\nvoid randomizedSetFree(RandomizedSet* obj) {\n\n}\n\n/**\n * Your RandomizedSet struct will be instantiated and called as such:\n * RandomizedSet* obj = randomizedSetCreate();\n * bool param_1 = randomizedSetInsert(obj, val);\n \n * bool param_2 = randomizedSetRemove(obj, val);\n \n * int param_3 = randomizedSetGetRandom(obj);\n \n * randomizedSetFree(obj);\n*/",
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                    "code": "public class RandomizedSet {\n\n    /** Initialize your data structure here. */\n    public RandomizedSet() {\n\n    }\n    \n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    public bool Insert(int val) {\n\n    }\n    \n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    public bool Remove(int val) {\n\n    }\n    \n    /** Get a random element from the set. */\n    public int GetRandom() {\n\n    }\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * RandomizedSet obj = new RandomizedSet();\n * bool param_1 = obj.Insert(val);\n * bool param_2 = obj.Remove(val);\n * int param_3 = obj.GetRandom();\n */",
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                    "lang": "JavaScript",
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                    "code": "/**\n * Initialize your data structure here.\n */\nvar RandomizedSet = function() {\n\n};\n\n/**\n * Inserts a value to the set. Returns true if the set did not already contain the specified element. \n * @param {number} val\n * @return {boolean}\n */\nRandomizedSet.prototype.insert = function(val) {\n\n};\n\n/**\n * Removes a value from the set. Returns true if the set contained the specified element. \n * @param {number} val\n * @return {boolean}\n */\nRandomizedSet.prototype.remove = function(val) {\n\n};\n\n/**\n * Get a random element from the set.\n * @return {number}\n */\nRandomizedSet.prototype.getRandom = function() {\n\n};\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * var obj = new RandomizedSet()\n * var param_1 = obj.insert(val)\n * var param_2 = obj.remove(val)\n * var param_3 = obj.getRandom()\n */",
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                    "code": "class RandomizedSet\n\n=begin\n    Initialize your data structure here.\n=end\n    def initialize()\n\n    end\n\n\n=begin\n    Inserts a value to the set. Returns true if the set did not already contain the specified element.\n    :type val: Integer\n    :rtype: Boolean\n=end\n    def insert(val)\n\n    end\n\n\n=begin\n    Removes a value from the set. Returns true if the set contained the specified element.\n    :type val: Integer\n    :rtype: Boolean\n=end\n    def remove(val)\n\n    end\n\n\n=begin\n    Get a random element from the set.\n    :rtype: Integer\n=end\n    def get_random()\n\n    end\n\n\nend\n\n# Your RandomizedSet object will be instantiated and called as such:\n# obj = RandomizedSet.new()\n# param_1 = obj.insert(val)\n# param_2 = obj.remove(val)\n# param_3 = obj.get_random()",
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                    "code": "\nclass RandomizedSet {\n\n    /** Initialize your data structure here. */\n    init() {\n\n    }\n    \n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    func insert(_ val: Int) -> Bool {\n\n    }\n    \n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    func remove(_ val: Int) -> Bool {\n\n    }\n    \n    /** Get a random element from the set. */\n    func getRandom() -> Int {\n\n    }\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * let obj = RandomizedSet()\n * let ret_1: Bool = obj.insert(val)\n * let ret_2: Bool = obj.remove(val)\n * let ret_3: Int = obj.getRandom()\n */",
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                    "lang": "Go",
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                    "code": "type RandomizedSet struct {\n\n}\n\n\n/** Initialize your data structure here. */\nfunc Constructor() RandomizedSet {\n\n}\n\n\n/** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\nfunc (this *RandomizedSet) Insert(val int) bool {\n\n}\n\n\n/** Removes a value from the set. Returns true if the set contained the specified element. */\nfunc (this *RandomizedSet) Remove(val int) bool {\n\n}\n\n\n/** Get a random element from the set. */\nfunc (this *RandomizedSet) GetRandom() int {\n\n}\n\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * obj := Constructor();\n * param_1 := obj.Insert(val);\n * param_2 := obj.Remove(val);\n * param_3 := obj.GetRandom();\n */",
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                    "code": "class RandomizedSet() {\n\n    /** Initialize your data structure here. */\n\n\n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    def insert(`val`: Int): Boolean = {\n\n    }\n\n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    def remove(`val`: Int): Boolean = {\n\n    }\n\n    /** Get a random element from the set. */\n    def getRandom(): Int = {\n\n    }\n\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * var obj = new RandomizedSet()\n * var param_1 = obj.insert(`val`)\n * var param_2 = obj.remove(`val`)\n * var param_3 = obj.getRandom()\n */",
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                    "lang": "Kotlin",
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                    "code": "class RandomizedSet() {\n\n    /** Initialize your data structure here. */\n\n\n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    fun insert(`val`: Int): Boolean {\n\n    }\n\n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    fun remove(`val`: Int): Boolean {\n\n    }\n\n    /** Get a random element from the set. */\n    fun getRandom(): Int {\n\n    }\n\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * var obj = RandomizedSet()\n * var param_1 = obj.insert(`val`)\n * var param_2 = obj.remove(`val`)\n * var param_3 = obj.getRandom()\n */",
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                    "code": "struct RandomizedSet {\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 RandomizedSet {\n\n    /** Initialize your data structure here. */\n    fn new() -> Self {\n\n    }\n    \n    /** Inserts a value to the set. Returns true if the set did not already contain the specified element. */\n    fn insert(&self, val: i32) -> bool {\n\n    }\n    \n    /** Removes a value from the set. Returns true if the set contained the specified element. */\n    fn remove(&self, val: i32) -> bool {\n\n    }\n    \n    /** Get a random element from the set. */\n    fn get_random(&self) -> i32 {\n\n    }\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * let obj = RandomizedSet::new();\n * let ret_1: bool = obj.insert(val);\n * let ret_2: bool = obj.remove(val);\n * let ret_3: i32 = obj.get_random();\n */",
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                    "code": "class RandomizedSet {\n    /**\n     * Initialize your data structure here.\n     */\n    function __construct() {\n\n    }\n\n    /**\n     * Inserts a value to the set. Returns true if the set did not already contain the specified element.\n     * @param Integer $val\n     * @return Boolean\n     */\n    function insert($val) {\n\n    }\n\n    /**\n     * Removes a value from the set. Returns true if the set contained the specified element.\n     * @param Integer $val\n     * @return Boolean\n     */\n    function remove($val) {\n\n    }\n\n    /**\n     * Get a random element from the set.\n     * @return Integer\n     */\n    function getRandom() {\n\n    }\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * $obj = RandomizedSet();\n * $ret_1 = $obj->insert($val);\n * $ret_2 = $obj->remove($val);\n * $ret_3 = $obj->getRandom();\n */",
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                    "code": "class RandomizedSet {\n    constructor() {\n\n    }\n\n    insert(val: number): boolean {\n\n    }\n\n    remove(val: number): boolean {\n\n    }\n\n    getRandom(): number {\n\n    }\n}\n\n/**\n * Your RandomizedSet object will be instantiated and called as such:\n * var obj = new RandomizedSet()\n * var param_1 = obj.insert(val)\n * var param_2 = obj.remove(val)\n * var param_3 = obj.getRandom()\n */",
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                    "lang": "Racket",
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                    "code": "(define randomized-set%\n  (class object%\n    (super-new)\n    (init-field)\n    \n    ; insert : exact-integer? -> boolean?\n    (define/public (insert val)\n\n      )\n    ; remove : exact-integer? -> boolean?\n    (define/public (remove val)\n\n      )\n    ; get-random : -> exact-integer?\n    (define/public (get-random)\n\n      )))\n\n;; Your randomized-set% object will be instantiated and called as such:\n;; (define obj (new randomized-set%))\n;; (define param_1 (send obj insert val))\n;; (define param_2 (send obj remove val))\n;; (define param_3 (send obj get-random))",
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                    "code": "defmodule RandomizedSet do\n  @spec init_() :: any\n  def init_() do\n\n  end\n\n  @spec insert(val :: integer) :: boolean\n  def insert(val) do\n\n  end\n\n  @spec remove(val :: integer) :: boolean\n  def remove(val) do\n\n  end\n\n  @spec get_random() :: integer\n  def get_random() do\n\n  end\nend\n\n# Your functions will be called as such:\n# RandomizedSet.init_()\n# param_1 = RandomizedSet.insert(val)\n# param_2 = RandomizedSet.remove(val)\n# param_3 = RandomizedSet.get_random()\n\n# RandomizedSet.init_ will be called before every test case, in which you can do some necessary initializations.",
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