leetcode-problemset/leetcode-cn/originData/dui-lie-de-zui-da-zhi-lcof.json

{
    "data": {
        "question": {
            "questionId": "100337",
            "questionFrontendId": "LCR 184",
            "categoryTitle": "Algorithms",
            "boundTopicId": 88051,
            "title": "设计自助结算系统",
            "titleSlug": "dui-lie-de-zui-da-zhi-lcof",
            "content": "<p>English description is not available for the problem. Please switch to Chinese.</p>\r\n",
            "translatedTitle": "设计自助结算系统",
            "translatedContent": "<p>请设计一个自助结账系统，该系统需要通过一个队列来模拟顾客通过购物车的结算过程，需要实现的功能有：</p>\n\n<ul>\n\t<li><code>get_max()</code>：获取结算商品中的最高价格，如果队列为空，则返回 -1</li>\n\t<li><code>add(value)</code>：将价格为 <code>value</code> 的商品加入待结算商品队列的尾部</li>\n\t<li><code>remove()</code>：移除第一个待结算的商品价格，如果队列为空，则返回 -1</li>\n</ul>\n\n<p>注意，为保证该系统运转高效性，以上函数的均摊时间复杂度均为 O(1)</p>\n\n<p>&nbsp;</p>\n\n<p><strong>示例 1：</strong></p>\n\n<pre>\n输入: \n[\"Checkout\",\"add\",\"add\",\"get_max\",\"remove\",\"get_max\"]\n[[],[4],[7],[],[],[]]\n\n输出: [null,null,null,7,4,7]\n</pre>\n\n<p><strong>示例 2：</strong></p>\n\n<pre>\n输入: \n[\"Checkout\",\"remove\",\"get_max\"]\n[[],[],[]]\n\n输出: [null,-1,-1]\n</pre>\n\n<p>&nbsp;</p>\n\n<p><strong>提示：</strong></p>\n\n<ul>\n\t<li><code>1 &lt;= get_max, add, remove 的总操作数&nbsp;&lt;= 10000</code></li>\n\t<li><code>1 &lt;= value &lt;= 10^5</code></li>\n</ul>\n\n<p>&nbsp;</p>\n",
            "isPaidOnly": false,
            "difficulty": "Medium",
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                    "slug": "design",
                    "translatedName": "设计",
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                {
                    "name": "Queue",
                    "slug": "queue",
                    "translatedName": "队列",
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                {
                    "name": "Monotonic Queue",
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                    "translatedName": "单调队列",
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                    "lang": "C++",
                    "langSlug": "cpp",
                    "code": "class Checkout {\npublic:\n    Checkout() {\n        \n    }\n    \n    int get_max() {\n        \n    }\n    \n    void add(int value) {\n        \n    }\n    \n    int remove() {\n        \n    }\n};\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * Checkout* obj = new Checkout();\n * int param_1 = obj->get_max();\n * obj->add(value);\n * int param_3 = obj->remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Java",
                    "langSlug": "java",
                    "code": "class Checkout {\n\n    public Checkout() {\n        \n    }\n    \n    public int get_max() {\n        \n    }\n    \n    public void add(int value) {\n        \n    }\n    \n    public int remove() {\n        \n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * Checkout obj = new Checkout();\n * int param_1 = obj.get_max();\n * obj.add(value);\n * int param_3 = obj.remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Python",
                    "langSlug": "python",
                    "code": "class Checkout(object):\n\n    def __init__(self):\n        \n\n    def get_max(self):\n        \"\"\"\n        :rtype: int\n        \"\"\"\n        \n\n    def add(self, value):\n        \"\"\"\n        :type value: int\n        :rtype: None\n        \"\"\"\n        \n\n    def remove(self):\n        \"\"\"\n        :rtype: int\n        \"\"\"\n        \n\n\n# Your Checkout object will be instantiated and called as such:\n# obj = Checkout()\n# param_1 = obj.get_max()\n# obj.add(value)\n# param_3 = obj.remove()",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Python3",
                    "langSlug": "python3",
                    "code": "class Checkout:\n\n    def __init__(self):\n        \n\n    def get_max(self) -> int:\n        \n\n    def add(self, value: int) -> None:\n        \n\n    def remove(self) -> int:\n        \n\n\n# Your Checkout object will be instantiated and called as such:\n# obj = Checkout()\n# param_1 = obj.get_max()\n# obj.add(value)\n# param_3 = obj.remove()",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "C",
                    "langSlug": "c",
                    "code": "\n\n\ntypedef struct {\n    \n} Checkout;\n\n\nCheckout* checkoutCreate() {\n    \n}\n\nint checkoutGet_max(Checkout* obj) {\n    \n}\n\nvoid checkoutAdd(Checkout* obj, int value) {\n    \n}\n\nint checkoutRemove(Checkout* obj) {\n    \n}\n\nvoid checkoutFree(Checkout* obj) {\n    \n}\n\n/**\n * Your Checkout struct will be instantiated and called as such:\n * Checkout* obj = checkoutCreate();\n * int param_1 = checkoutGet_max(obj);\n \n * checkoutAdd(obj, value);\n \n * int param_3 = checkoutRemove(obj);\n \n * checkoutFree(obj);\n*/",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "C#",
                    "langSlug": "csharp",
                    "code": "public class Checkout {\n\n    public Checkout() {\n        \n    }\n    \n    public int Get_max() {\n        \n    }\n    \n    public void Add(int value) {\n        \n    }\n    \n    public int Remove() {\n        \n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * Checkout obj = new Checkout();\n * int param_1 = obj.Get_max();\n * obj.Add(value);\n * int param_3 = obj.Remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "\nvar Checkout = function() {\n    \n};\n\n/**\n * @return {number}\n */\nCheckout.prototype.get_max = function() {\n    \n};\n\n/** \n * @param {number} value\n * @return {void}\n */\nCheckout.prototype.add = function(value) {\n    \n};\n\n/**\n * @return {number}\n */\nCheckout.prototype.remove = function() {\n    \n};\n\n/** \n * Your Checkout object will be instantiated and called as such:\n * var obj = new Checkout()\n * var param_1 = obj.get_max()\n * obj.add(value)\n * var param_3 = obj.remove()\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "class Checkout {\n    constructor() {\n        \n    }\n\n    get_max(): number {\n        \n    }\n\n    add(value: number): void {\n        \n    }\n\n    remove(): number {\n        \n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * var obj = new Checkout()\n * var param_1 = obj.get_max()\n * obj.add(value)\n * var param_3 = obj.remove()\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "PHP",
                    "langSlug": "php",
                    "code": "class Checkout {\n    /**\n     */\n    function __construct() {\n        \n    }\n  \n    /**\n     * @return Integer\n     */\n    function get_max() {\n        \n    }\n  \n    /**\n     * @param Integer $value\n     * @return NULL\n     */\n    function add($value) {\n        \n    }\n  \n    /**\n     * @return Integer\n     */\n    function remove() {\n        \n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * $obj = Checkout();\n * $ret_1 = $obj->get_max();\n * $obj->add($value);\n * $ret_3 = $obj->remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Swift",
                    "langSlug": "swift",
                    "code": "\nclass Checkout {\n\n    init() {\n        \n    }\n    \n    func get_max() -> Int {\n        \n    }\n    \n    func add(_ value: Int) {\n        \n    }\n    \n    func remove() -> Int {\n        \n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * let obj = Checkout()\n * let ret_1: Int = obj.get_max()\n * obj.add(value)\n * let ret_3: Int = obj.remove()\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Kotlin",
                    "langSlug": "kotlin",
                    "code": "class Checkout() {\n\n    fun get_max(): Int {\n        \n    }\n\n    fun add(value: Int) {\n        \n    }\n\n    fun remove(): Int {\n        \n    }\n\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * var obj = Checkout()\n * var param_1 = obj.get_max()\n * obj.add(value)\n * var param_3 = obj.remove()\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Dart",
                    "langSlug": "dart",
                    "code": "class Checkout {\n\n  Checkout() {\n    \n  }\n  \n  int get_max() {\n    \n  }\n  \n  void add(int value) {\n    \n  }\n  \n  int remove() {\n    \n  }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * Checkout obj = Checkout();\n * int param1 = obj.get_max();\n * obj.add(value);\n * int param3 = obj.remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Go",
                    "langSlug": "golang",
                    "code": "type Checkout struct {\n    \n}\n\n\nfunc Constructor() Checkout {\n    \n}\n\n\nfunc (this *Checkout) Get_max() int {\n    \n}\n\n\nfunc (this *Checkout) Add(value int)  {\n    \n}\n\n\nfunc (this *Checkout) Remove() int {\n    \n}\n\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * obj := Constructor();\n * param_1 := obj.Get_max();\n * obj.Add(value);\n * param_3 := obj.Remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Ruby",
                    "langSlug": "ruby",
                    "code": "class Checkout\n    def initialize()\n        \n    end\n\n\n=begin\n    :rtype: Integer\n=end\n    def get_max()\n        \n    end\n\n\n=begin\n    :type value: Integer\n    :rtype: Void\n=end\n    def add(value)\n        \n    end\n\n\n=begin\n    :rtype: Integer\n=end\n    def remove()\n        \n    end\n\n\nend\n\n# Your Checkout object will be instantiated and called as such:\n# obj = Checkout.new()\n# param_1 = obj.get_max()\n# obj.add(value)\n# param_3 = obj.remove()",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Scala",
                    "langSlug": "scala",
                    "code": "class Checkout() {\n\n    def get_max(): Int = {\n        \n    }\n\n    def add(value: Int): Unit = {\n        \n    }\n\n    def remove(): Int = {\n        \n    }\n\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * val obj = new Checkout()\n * val param_1 = obj.get_max()\n * obj.add(value)\n * val param_3 = obj.remove()\n */",
                    "__typename": "CodeSnippetNode"
                },
                {
                    "lang": "Rust",
                    "langSlug": "rust",
                    "code": "struct Checkout {\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 Checkout {\n\n    fn new() -> Self {\n        \n    }\n    \n    fn get_max(&self) -> i32 {\n        \n    }\n    \n    fn add(&self, value: i32) {\n        \n    }\n    \n    fn remove(&self) -> i32 {\n        \n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * let obj = Checkout::new();\n * let ret_1: i32 = obj.get_max();\n * obj.add(value);\n * let ret_3: i32 = obj.remove();\n */",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Racket",
                    "langSlug": "racket",
                    "code": "(define checkout%\n  (class object%\n    (super-new)\n    \n    (init-field)\n    \n    ; get_max : -> exact-integer?\n    (define/public (get_max)\n      )\n    ; add : exact-integer? -> void?\n    (define/public (add value)\n      )\n    ; remove : -> exact-integer?\n    (define/public (remove)\n      )))\n\n;; Your checkout% object will be instantiated and called as such:\n;; (define obj (new checkout%))\n;; (define param_1 (send obj get_max))\n;; (send obj add value)\n;; (define param_3 (send obj remove))",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Erlang",
                    "langSlug": "erlang",
                    "code": "-spec checkout_init_() -> any().\ncheckout_init_() ->\n  .\n\n-spec checkout_get_max() -> integer().\ncheckout_get_max() ->\n  .\n\n-spec checkout_add(Value :: integer()) -> any().\ncheckout_add(Value) ->\n  .\n\n-spec checkout_remove() -> integer().\ncheckout_remove() ->\n  .\n\n\n%% Your functions will be called as such:\n%% checkout_init_(),\n%% Param_1 = checkout_get_max(),\n%% checkout_add(Value),\n%% Param_3 = checkout_remove(),\n\n%% checkout_init_ will be called before every test case, in which you can do some necessary initializations.",
                    "__typename": "CodeSnippetNode"
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                {
                    "lang": "Elixir",
                    "langSlug": "elixir",
                    "code": "defmodule Checkout do\n  @spec init_() :: any\n  def init_() do\n    \n  end\n\n  @spec get_max() :: integer\n  def get_max() do\n    \n  end\n\n  @spec add(value :: integer) :: any\n  def add(value) do\n    \n  end\n\n  @spec remove() :: integer\n  def remove() do\n    \n  end\nend\n\n# Your functions will be called as such:\n# Checkout.init_()\n# param_1 = Checkout.get_max()\n# Checkout.add(value)\n# param_3 = Checkout.remove()\n\n# Checkout.init_ will be called before every test case, in which you can do some necessary initializations.",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Cangjie",
                    "langSlug": "cangjie",
                    "code": "class Checkout {\n    init() {\n\n    }\n    \n    func get_max(): Int64 {\n\n    }\n    \n    func add(value: Int64): Unit {\n\n    }\n    \n    func remove(): Int64 {\n\n    }\n}\n\n/**\n * Your Checkout object will be instantiated and called as such:\n * let obj: Checkout = Checkout()\n * let param_1 = obj.get_max()\n * obj.add(value)\n * let param_3 = obj.remove()\n */",
                    "__typename": "CodeSnippetNode"
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            "status": null,
            "sampleTestCase": "[\"Checkout\",\"add\",\"add\",\"get_max\",\"remove\",\"get_max\"]\n[[],[4],[7],[],[],[]]",
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<code>use-after-free<\\/code> \\u9519\\u8bef\\u3002<\\/p>\\r\\n\\r\\n<p>\\u4e3a\\u4e86\\u4f7f\\u7528\\u65b9\\u4fbf\\uff0c\\u5927\\u90e8\\u5206\\u6807\\u51c6\\u5e93\\u7684\\u5934\\u6587\\u4ef6\\u5df2\\u7ecf\\u88ab\\u81ea\\u52a8\\u5bfc\\u5165\\u3002<\\/p>\\r\\n\\r\\n<p>\\u5982\\u60f3\\u4f7f\\u7528\\u54c8\\u5e0c\\u8868\\u8fd0\\u7b97, \\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 <a href=\\\"https:\\/\\/troydhanson.github.io\\/uthash\\/\\\" target=\\\"_blank\\\">uthash<\\/a>\\u3002 \\\"uthash.h\\\"\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5bfc\\u5165\\u3002\\u8bf7\\u770b\\u5982\\u4e0b\\u793a\\u4f8b:<\\/p>\\r\\n\\r\\n<p><b>1. \\u5f80\\u54c8\\u5e0c\\u8868\\u4e2d\\u6dfb\\u52a0\\u4e00\\u4e2a\\u5bf9\\u8c61\\uff1a<\\/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 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target=\\\"_blank\\\"> datastructures-js\\/deque@1.0.4<\\/a>\\u3002<\\/p>\"],\"ruby\":[\"Ruby\",\"<p>\\u4f7f\\u7528 <code>Ruby 3.2<\\/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 6.0<\\/code><\\/p>\\r\\n\\r\\n<p>\\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 <a href=\\\"https:\\/\\/github.com\\/apple\\/swift-algorithms\\/tree\\/1.2.0\\\" target=\\\"_blank\\\">swift-algorithms 1.2.0<\\/a>\\uff0c<a href=\\\"https:\\/\\/github.com\\/apple\\/swift-collections\\/tree\\/1.1.4\\\" target=\\\"_blank\\\">swift-collections 1.1.4<\\/a> \\u548c <a href=\\\"https:\\/\\/github.com\\/apple\\/swift-numerics\\/tree\\/1.0.2\\\" target=\\\"_blank\\\">swift-numerics 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target=\\\"_blank\\\">sortedcontainers<\\/a> \\u5e93\\u3002<\\/p>\"],\"scala\":[\"Scala\",\"<p>\\u7248\\u672c\\uff1a<code>Scala 3.3.1<\\/code><\\/p>\"],\"kotlin\":[\"Kotlin\",\"<p>\\u7248\\u672c\\uff1a<code>Kotlin 1.9.0<\\/code><\\/p>\\r\\n\\r\\n<p>\\u6211\\u4eec\\u4f7f\\u7528\\u7684\\u662f JetBrains \\u63d0\\u4f9b\\u7684 experimental compiler\\u3002\\u5982\\u679c\\u60a8\\u8ba4\\u4e3a\\u60a8\\u9047\\u5230\\u4e86\\u7f16\\u8bd1\\u5668\\u76f8\\u5173\\u7684\\u95ee\\u9898\\uff0c\\u8bf7\\u5411\\u6211\\u4eec\\u53cd\\u9988<\\/p>\"],\"rust\":[\"Rust\",\"<p>\\u7248\\u672c\\uff1a<code>rust 1.79.0<\\/code><\\/p>\\r\\n\\r\\n<p>\\u652f\\u6301 crates.io \\u7684 <a href=\\\"https:\\/\\/crates.io\\/crates\\/rand\\\" target=\\\"_blank\\\">rand<\\/a> \\u548c <a href=\\\"https:\\/\\/crates.io\\/crates\\/regex\\\" target=\\\"_blank\\\">regex<\\/a><\\/p>\"],\"php\":[\"PHP\",\"<p><code>PHP 8.2<\\/code>.<\\/p>\\r\\n\\r\\n<p>With bcmath module.<\\/p>\"],\"typescript\":[\"TypeScript\",\"<p>TypeScript 5.1.6<\\/p>\\r\\n\\r\\n<p>Compile Options: --alwaysStrict --strictBindCallApply --strictFunctionTypes --target ES2022<\\/p>\\r\\n\\r\\n<p><a href=\\\"https:\\/\\/lodash.com\\\" target=\\\"_blank\\\">lodash.js<\\/a> \\u5e93\\u5df2\\u7ecf\\u9ed8\\u8ba4\\u88ab\\u5305\\u542b\\u3002<\\/p>\\r\\n\\r\\n<p> \\u5982\\u9700\\u4f7f\\u7528\\u961f\\u5217\\/\\u4f18\\u5148\\u961f\\u5217\\uff0c\\u60a8\\u53ef\\u4f7f\\u7528 <a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/priority-queue\\/blob\\/v5\\/README.md\\\" target=\\\"_blank\\\"> datastructures-js\\/priority-queue@5.4.0<\\/a>\\uff0c<a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/queue\\/tree\\/v4.2.3\\\" target=\\\"_blank\\\"> datastructures-js\\/queue@4.2.3<\\/a> \\u4ee5\\u53ca <a href=\\\"https:\\/\\/github.com\\/datastructures-js\\/deque\\/tree\\/v1.0.4\\\" target=\\\"_blank\\\"> datastructures-js\\/deque@1.0.4<\\/a>\\u3002<\\/p>\"],\"racket\":[\"Racket\",\"<p><a href=\\\"https:\\/\\/docs.racket-lang.org\\/guide\\/performance.html#%28tech._c%29\\\" target=\\\"_blank\\\">Racket CS<\\/a> v8.15<\\/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 26\"],\"elixir\":[\"Elixir\",\"Elixir 1.17 with Erlang\\/OTP 26\"],\"dart\":[\"Dart\",\"<p>Dart 3.2\\u3002\\u60a8\\u53ef\\u4ee5\\u4f7f\\u7528 <a href=\\\"https:\\/\\/pub.dev\\/packages\\/collection\\/versions\\/1.18.0\\\" target=\\\"_blank\\\">collection<\\/a> \\u5305<\\/p>\\r\\n\\r\\n<p>\\u60a8\\u7684\\u4ee3\\u7801\\u5c06\\u4f1a\\u88ab\\u4e0d\\u7f16\\u8bd1\\u76f4\\u63a5\\u8fd0\\u884c<\\/p>\"],\"cangjie\":[\"Cangjie\",\"<p>\\u7248\\u672c\\uff1a0.53.11 (cjnative)<\\/p>\\r\\n\\r\\n<p>\\u7f16\\u8bd1\\u53c2\\u6570\\uff1a<code>-O2 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