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    "data": {
        "question": {
            "questionId": "384",
            "questionFrontendId": "384",
            "categoryTitle": "Algorithms",
            "boundTopicId": 1876,
            "title": "Shuffle an Array",
            "titleSlug": "shuffle-an-array",
            "content": "<p>Given an integer array <code>nums</code>, design an algorithm to randomly shuffle the array. All permutations of the array should be <strong>equally likely</strong> as a result of the shuffling.</p>\n\n<p>Implement the <code>Solution</code> class:</p>\n\n<ul>\n\t<li><code>Solution(int[] nums)</code> Initializes the object with the integer array <code>nums</code>.</li>\n\t<li><code>int[] reset()</code> Resets the array to its original configuration and returns it.</li>\n\t<li><code>int[] shuffle()</code> Returns a random shuffling of the array.</li>\n</ul>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n[&quot;Solution&quot;, &quot;shuffle&quot;, &quot;reset&quot;, &quot;shuffle&quot;]\n[[[1, 2, 3]], [], [], []]\n<strong>Output</strong>\n[null, [3, 1, 2], [1, 2, 3], [1, 3, 2]]\n\n<strong>Explanation</strong>\nSolution solution = new Solution([1, 2, 3]);\nsolution.shuffle();    // Shuffle the array [1,2,3] and return its result.\n                       // Any permutation of [1,2,3] must be equally likely to be returned.\n                       // Example: return [3, 1, 2]\nsolution.reset();      // Resets the array back to its original configuration [1,2,3]. Return [1, 2, 3]\nsolution.shuffle();    // Returns the random shuffling of array [1,2,3]. Example: return [1, 3, 2]\n\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 200</code></li>\n\t<li><code>-10<sup>6</sup> &lt;= nums[i] &lt;= 10<sup>6</sup></code></li>\n\t<li>All the elements of <code>nums</code> are <strong>unique</strong>.</li>\n\t<li>At most <code>5 * 10<sup>4</sup></code> calls <strong>in total</strong> will be made to <code>reset</code> and <code>shuffle</code>.</li>\n</ul>\n",
            "translatedTitle": "打乱数组",
            "translatedContent": "<p>给你一个整数数组 <code>nums</code> ，设计算法来打乱一个没有重复元素的数组。打乱后，数组的所有排列应该是&nbsp;<strong>等可能</strong>&nbsp;的。</p>\n\n<p>实现 <code>Solution</code> class:</p>\n\n<ul>\n\t<li><code>Solution(int[] nums)</code> 使用整数数组 <code>nums</code> 初始化对象</li>\n\t<li><code>int[] reset()</code> 重设数组到它的初始状态并返回</li>\n\t<li><code>int[] shuffle()</code> 返回数组随机打乱后的结果</li>\n</ul>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n<strong>输入</strong>\n[\"Solution\", \"shuffle\", \"reset\", \"shuffle\"]\n[[[1, 2, 3]], [], [], []]\n<strong>输出</strong>\n[null, [3, 1, 2], [1, 2, 3], [1, 3, 2]]\n\n<strong>解释</strong>\nSolution solution = new Solution([1, 2, 3]);\nsolution.shuffle();    // 打乱数组 [1,2,3] 并返回结果。任何 [1,2,3]的排列返回的概率应该相同。例如，返回 [3, 1, 2]\nsolution.reset();      // 重设数组到它的初始状态 [1, 2, 3] 。返回 [1, 2, 3]\nsolution.shuffle();    // 随机返回数组 [1, 2, 3] 打乱后的结果。例如，返回 [1, 3, 2]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= nums.length &lt;= 200</code></li>\n\t<li><code>-10<sup>6</sup> &lt;= nums[i] &lt;= 10<sup>6</sup></code></li>\n\t<li><code>nums</code> 中的所有元素都是 <strong>唯一的</strong></li>\n\t<li>最多可以调用 <code>5 * 10<sup>4</sup></code> 次 <code>reset</code> 和 <code>shuffle</code></li>\n</ul>\n",
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                    "lang": "C++",
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                    "code": "class Solution {\npublic:\n    Solution(vector<int>& nums) {\n\n    }\n    \n    vector<int> reset() {\n\n    }\n    \n    vector<int> shuffle() {\n\n    }\n};\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution* obj = new Solution(nums);\n * vector<int> param_1 = obj->reset();\n * vector<int> param_2 = obj->shuffle();\n */",
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                    "lang": "Java",
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                    "code": "class Solution {\n\n    public Solution(int[] nums) {\n\n    }\n    \n    public int[] reset() {\n\n    }\n    \n    public int[] shuffle() {\n\n    }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = new Solution(nums);\n * int[] param_1 = obj.reset();\n * int[] param_2 = obj.shuffle();\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Python",
                    "langSlug": "python",
                    "code": "class Solution(object):\n\n    def __init__(self, nums):\n        \"\"\"\n        :type nums: List[int]\n        \"\"\"\n\n\n    def reset(self):\n        \"\"\"\n        :rtype: List[int]\n        \"\"\"\n\n\n    def shuffle(self):\n        \"\"\"\n        :rtype: List[int]\n        \"\"\"\n\n\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution(nums)\n# param_1 = obj.reset()\n# param_2 = obj.shuffle()",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Python3",
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                    "code": "class Solution:\n\n    def __init__(self, nums: List[int]):\n\n\n    def reset(self) -> List[int]:\n\n\n    def shuffle(self) -> List[int]:\n\n\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution(nums)\n# param_1 = obj.reset()\n# param_2 = obj.shuffle()",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "C",
                    "langSlug": "c",
                    "code": "\n\n\ntypedef struct {\n\n} Solution;\n\n\nSolution* solutionCreate(int* nums, int numsSize) {\n\n}\n\nint* solutionReset(Solution* obj, int* retSize) {\n\n}\n\nint* solutionShuffle(Solution* obj, int* retSize) {\n\n}\n\nvoid solutionFree(Solution* obj) {\n\n}\n\n/**\n * Your Solution struct will be instantiated and called as such:\n * Solution* obj = solutionCreate(nums, numsSize);\n * int* param_1 = solutionReset(obj, retSize);\n \n * int* param_2 = solutionShuffle(obj, retSize);\n \n * solutionFree(obj);\n*/",
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                {
                    "lang": "C#",
                    "langSlug": "csharp",
                    "code": "public class Solution {\n\n    public Solution(int[] nums) {\n\n    }\n    \n    public int[] Reset() {\n\n    }\n    \n    public int[] Shuffle() {\n\n    }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * Solution obj = new Solution(nums);\n * int[] param_1 = obj.Reset();\n * int[] param_2 = obj.Shuffle();\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * @param {number[]} nums\n */\nvar Solution = function(nums) {\n\n};\n\n/**\n * @return {number[]}\n */\nSolution.prototype.reset = function() {\n\n};\n\n/**\n * @return {number[]}\n */\nSolution.prototype.shuffle = function() {\n\n};\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(nums)\n * var param_1 = obj.reset()\n * var param_2 = obj.shuffle()\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Ruby",
                    "langSlug": "ruby",
                    "code": "class Solution\n\n=begin\n    :type nums: Integer[]\n=end\n    def initialize(nums)\n\n    end\n\n\n=begin\n    :rtype: Integer[]\n=end\n    def reset()\n\n    end\n\n\n=begin\n    :rtype: Integer[]\n=end\n    def shuffle()\n\n    end\n\n\nend\n\n# Your Solution object will be instantiated and called as such:\n# obj = Solution.new(nums)\n# param_1 = obj.reset()\n# param_2 = obj.shuffle()",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Swift",
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                    "code": "\nclass Solution {\n\n    init(_ nums: [Int]) {\n\n    }\n    \n    func reset() -> [Int] {\n\n    }\n    \n    func shuffle() -> [Int] {\n\n    }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * let obj = Solution(nums)\n * let ret_1: [Int] = obj.reset()\n * let ret_2: [Int] = obj.shuffle()\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Go",
                    "langSlug": "golang",
                    "code": "type Solution struct {\n\n}\n\n\nfunc Constructor(nums []int) Solution {\n\n}\n\n\nfunc (this *Solution) Reset() []int {\n\n}\n\n\nfunc (this *Solution) Shuffle() []int {\n\n}\n\n\n/**\n * Your Solution object will be instantiated and called as such:\n * obj := Constructor(nums);\n * param_1 := obj.Reset();\n * param_2 := obj.Shuffle();\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Scala",
                    "langSlug": "scala",
                    "code": "class Solution(_nums: Array[Int]) {\n\n    def reset(): Array[Int] = {\n\n    }\n\n    def shuffle(): Array[Int] = {\n\n    }\n\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(nums)\n * var param_1 = obj.reset()\n * var param_2 = obj.shuffle()\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Kotlin",
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                    "code": "class Solution(nums: IntArray) {\n\n    fun reset(): IntArray {\n\n    }\n\n    fun shuffle(): IntArray {\n\n    }\n\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = Solution(nums)\n * var param_1 = obj.reset()\n * var param_2 = obj.shuffle()\n */",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Rust",
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                    "code": "struct Solution {\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 Solution {\n\n    fn new(nums: Vec<i32>) -> Self {\n\n    }\n    \n    fn reset(&self) -> Vec<i32> {\n\n    }\n    \n    fn shuffle(&self) -> Vec<i32> {\n\n    }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * let obj = Solution::new(nums);\n * let ret_1: Vec<i32> = obj.reset();\n * let ret_2: Vec<i32> = obj.shuffle();\n */",
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                    "lang": "PHP",
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                    "code": "class Solution {\n    /**\n     * @param Integer[] $nums\n     */\n    function __construct($nums) {\n\n    }\n\n    /**\n     * @return Integer[]\n     */\n    function reset() {\n\n    }\n\n    /**\n     * @return Integer[]\n     */\n    function shuffle() {\n\n    }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * $obj = Solution($nums);\n * $ret_1 = $obj->reset();\n * $ret_2 = $obj->shuffle();\n */",
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                    "code": "class Solution {\n    constructor(nums: number[]) {\n\n    }\n\n    reset(): number[] {\n\n    }\n\n    shuffle(): number[] {\n\n    }\n}\n\n/**\n * Your Solution object will be instantiated and called as such:\n * var obj = new Solution(nums)\n * var param_1 = obj.reset()\n * var param_2 = obj.shuffle()\n */",
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                    "code": "-spec solution_init_(Nums :: [integer()]) -> any().\nsolution_init_(Nums) ->\n  .\n\n-spec solution_reset() -> [integer()].\nsolution_reset() ->\n  .\n\n-spec solution_shuffle() -> [integer()].\nsolution_shuffle() ->\n  .\n\n\n%% Your functions will be called as such:\n%% solution_init_(Nums),\n%% Param_1 = solution_reset(),\n%% Param_2 = solution_shuffle(),\n\n%% solution_init_ will be called before every test case, in which you can do some necessary initializations.",
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                    "lang": "Elixir",
                    "langSlug": "elixir",
                    "code": "defmodule Solution do\n  @spec init_(nums :: [integer]) :: any\n  def init_(nums) do\n\n  end\n\n  @spec reset() :: [integer]\n  def reset() do\n\n  end\n\n  @spec shuffle() :: [integer]\n  def shuffle() do\n\n  end\nend\n\n# Your functions will be called as such:\n# Solution.init_(nums)\n# param_1 = Solution.reset()\n# param_2 = Solution.shuffle()\n\n# Solution.init_ will be called before every test case, in which you can do some necessary initializations.",
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                "The solution expects that we always use the original array to shuffle() else some of the test cases fail. (Credits; @snehasingh31)"
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href=\\\"https:\\/\\/github.com\\/datastructures-js\\/queue\\\" target=\\\"_blank\\\"> datastructures-js\\/queue<\\/a>\\u3002<\\/p>\"],\"ruby\":[\"Ruby\",\"<p>\\u4f7f\\u7528<code>Ruby 3.1<\\/code>\\u6267\\u884c<\\/p>\\r\\n\\r\\n<p>\\u4e00\\u4e9b\\u5e38\\u7528\\u7684\\u6570\\u636e\\u7ed3\\u6784\\u5df2\\u5728 Algorithms \\u6a21\\u5757\\u4e2d\\u63d0\\u4f9b\\uff1ahttps:\\/\\/www.rubydoc.info\\/github\\/kanwei\\/algorithms\\/Algorithms<\\/p>\"],\"swift\":[\"Swift\",\"<p>\\u7248\\u672c\\uff1a<code>Swift 5.5.2<\\/code><\\/p>\\r\\n\\r\\n<p>\\u6211\\u4eec\\u901a\\u5e38\\u4fdd\\u8bc1\\u66f4\\u65b0\\u5230 <a href=\\\"https:\\/\\/swift.org\\/download\\/\\\" target=\\\"_blank\\\">Apple\\u653e\\u51fa\\u7684\\u6700\\u65b0\\u7248Swift<\\/a>\\u3002\\u5982\\u679c\\u60a8\\u53d1\\u73b0Swift\\u4e0d\\u662f\\u6700\\u65b0\\u7248\\u7684\\uff0c\\u8bf7\\u8054\\u7cfb\\u6211\\u4eec\\uff01\\u6211\\u4eec\\u5c06\\u5c3d\\u5feb\\u66f4\\u65b0\\u3002<\\/p>\"],\"golang\":[\"Go\",\"<p>\\u7248\\u672c\\uff1a<code>Go 1.17<\\/code><\\/p>\\r\\n\\r\\n<p>\\u652f\\u6301 <a href=\\\"https:\\/\\/godoc.org\\/github.com\\/emirpasic\\/gods\\\" target=\\\"_blank\\\">https:\\/\\/godoc.org\\/github.com\\/emirpasic\\/gods<\\/a> \\u7b2c\\u4e09\\u65b9\\u5e93\\u3002<\\/p>\"],\"python3\":[\"Python3\",\"<p>\\u7248\\u672c\\uff1a<code>Python 3.10<\\/code><\\/p>\\r\\n\\r\\n<p>\\u4e3a\\u4e86\\u65b9\\u4fbf\\u8d77\\u89c1\\uff0c\\u5927\\u90e8\\u5206\\u5e38\\u7528\\u5e93\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8 \\u5bfc\\u5165\\uff0c\\u5982<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>\\u3002 \\u5982\\u679c\\u60a8\\u9700\\u8981\\u4f7f\\u7528\\u5176\\u4ed6\\u5e93\\u51fd\\u6570\\uff0c\\u8bf7\\u81ea\\u884c\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n<p>\\u5982\\u9700\\u4f7f\\u7528 Map\\/TreeMap \\u6570\\u636e\\u7ed3\\u6784\\uff0c\\u60a8\\u53ef\\u4f7f\\u7528 <a href=\\\"http:\\/\\/www.grantjenks.com\\/docs\\/sortedcontainers\\/\\\" target=\\\"_blank\\\">sortedcontainers<\\/a> \\u5e93\\u3002<\\/p>\"],\"scala\":[\"Scala\",\"<p>\\u7248\\u672c\\uff1a<code>Scala 2.13<\\/code><\\/p>\"],\"kotlin\":[\"Kotlin\",\"<p>\\u7248\\u672c\\uff1a<code>Kotlin 1.3.10<\\/code><\\/p>\"],\"rust\":[\"Rust\",\"<p>\\u7248\\u672c\\uff1a<code>rust 1.58.1<\\/code><\\/p>\\r\\n\\r\\n<p>\\u652f\\u6301 crates.io \\u7684 <a href=\\\"https:\\/\\/crates.io\\/crates\\/rand\\\" target=\\\"_blank\\\">rand<\\/a><\\/p>\"],\"php\":[\"PHP\",\"<p><code>PHP 8.1<\\/code>.<\\/p>\\r\\n\\r\\n<p>With bcmath module.<\\/p>\"],\"typescript\":[\"TypeScript\",\"<p>TypeScript 4.5.4<\\/p>\\r\\n\\r\\n<p>Compile Options: --alwaysStrict --strictBindCallApply --strictFunctionTypes --target ES2020<\\/p>\"],\"racket\":[\"Racket\",\"<p><a href=\\\"https:\\/\\/docs.racket-lang.org\\/guide\\/performance.html#%28tech._c%29\\\" target=\\\"_blank\\\">Racket CS<\\/a> v8.3<\\/p>\\r\\n\\r\\n<p>\\u4f7f\\u7528 #lang racket<\\/p>\\r\\n\\r\\n<p>\\u5df2\\u9884\\u5148 (require data\\/gvector data\\/queue data\\/order data\\/heap). \\u82e5\\u9700\\u4f7f\\u7528\\u5176\\u5b83\\u6570\\u636e\\u7ed3\\u6784\\uff0c\\u53ef\\u81ea\\u884c require\\u3002<\\/p>\"],\"erlang\":[\"Erlang\",\"Erlang\\/OTP 24.2\"],\"elixir\":[\"Elixir\",\"Elixir 1.13.0 with Erlang\\/OTP 24.2\"]}",
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