{ "data": { "question": { "questionId": "2380", "questionFrontendId": "2286", "categoryTitle": "Algorithms", "boundTopicId": 1518390, "title": "Booking Concert Tickets in Groups", "titleSlug": "booking-concert-tickets-in-groups", "content": "

A concert hall has n rows numbered from 0 to n - 1, each with m seats, numbered from 0 to m - 1. You need to design a ticketing system that can allocate seats in the following cases:

\n\n\n\n

Note that the spectators are very picky. Hence:

\n\n\n\n

Implement the BookMyShow class:

\n\n\n\n

 

\n

Example 1:

\n\n
\nInput\n["BookMyShow", "gather", "gather", "scatter", "scatter"]\n[[2, 5], [4, 0], [2, 0], [5, 1], [5, 1]]\nOutput\n[null, [0, 0], [], true, false]\n\nExplanation\nBookMyShow bms = new BookMyShow(2, 5); // There are 2 rows with 5 seats each \nbms.gather(4, 0); // return [0, 0]\n                  // The group books seats [0, 3] of row 0. \nbms.gather(2, 0); // return []\n                  // There is only 1 seat left in row 0,\n                  // so it is not possible to book 2 consecutive seats. \nbms.scatter(5, 1); // return True\n                   // The group books seat 4 of row 0 and seats [0, 3] of row 1. \nbms.scatter(5, 1); // return False\n                   // There is only one seat left in the hall.\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "以组为单位订音乐会的门票", "translatedContent": "

一个音乐会总共有 n 排座位，编号从 0 到 n - 1 ，每一排有 m 个座椅，编号为 0 到 m - 1 。你需要设计一个买票系统，针对以下情况进行座位安排：

\n\n\n\n

由于观众非常挑剔，所以：

\n\n\n\n

请你实现 BookMyShow 类：

\n\n\n\n

 

\n\n

示例 1：

\n\n
\n输入：\n[\"BookMyShow\", \"gather\", \"gather\", \"scatter\", \"scatter\"]\n[[2, 5], [4, 0], [2, 0], [5, 1], [5, 1]]\n输出：\n[null, [0, 0], [], true, false]\n\n解释：\nBookMyShow bms = new BookMyShow(2, 5); // 总共有 2 排，每排 5 个座位。\nbms.gather(4, 0); // 返回 [0, 0]\n                  // 这一组安排第 0 排 [0, 3] 的座位。\nbms.gather(2, 0); // 返回 []\n                  // 第 0 排只剩下 1 个座位。\n                  // 所以无法安排 2 个连续座位。\nbms.scatter(5, 1); // 返回 True\n                   // 这一组安排第 0 排第 4 个座位和第 1 排 [0, 3] 的座位。\nbms.scatter(5, 1); // 返回 False\n                   // 总共只剩下 2 个座位。\n
\n\n

 

\n\n

提示：

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"binary-search", "translatedName": "二分查找", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "C++", "langSlug": "cpp", "code": "class BookMyShow {\npublic:\n BookMyShow(int n, int m) {\n\n }\n \n vector gather(int k, int maxRow) {\n\n }\n \n bool scatter(int k, int maxRow) {\n\n }\n};\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * BookMyShow* obj = new BookMyShow(n, m);\n * vector param_1 = obj->gather(k,maxRow);\n * bool param_2 = obj->scatter(k,maxRow);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Java", "langSlug": "java", "code": "class BookMyShow {\n\n public BookMyShow(int n, int m) {\n\n }\n \n public int[] gather(int k, int maxRow) {\n\n }\n \n public boolean scatter(int k, int maxRow) {\n\n }\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * BookMyShow obj = new BookMyShow(n, m);\n * int[] param_1 = obj.gather(k,maxRow);\n * boolean param_2 = obj.scatter(k,maxRow);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "class BookMyShow(object):\n\n def __init__(self, n, m):\n \"\"\"\n :type n: int\n :type m: int\n \"\"\"\n\n\n def gather(self, k, maxRow):\n \"\"\"\n :type k: int\n :type maxRow: int\n :rtype: List[int]\n \"\"\"\n\n\n def scatter(self, k, maxRow):\n \"\"\"\n :type k: int\n :type maxRow: int\n :rtype: bool\n \"\"\"\n\n\n\n# Your BookMyShow object will be instantiated and called as such:\n# obj = BookMyShow(n, m)\n# param_1 = obj.gather(k,maxRow)\n# param_2 = obj.scatter(k,maxRow)", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "class BookMyShow:\n\n def __init__(self, n: int, m: int):\n\n\n def gather(self, k: int, maxRow: int) -> List[int]:\n\n\n def scatter(self, k: int, maxRow: int) -> bool:\n\n\n\n# Your BookMyShow object will be instantiated and called as such:\n# obj = BookMyShow(n, m)\n# param_1 = obj.gather(k,maxRow)\n# param_2 = obj.scatter(k,maxRow)", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "\n\n\ntypedef struct {\n\n} BookMyShow;\n\n\nBookMyShow* bookMyShowCreate(int n, int m) {\n\n}\n\nint* bookMyShowGather(BookMyShow* obj, int k, int maxRow, int* retSize) {\n\n}\n\nbool bookMyShowScatter(BookMyShow* obj, int k, int maxRow) {\n\n}\n\nvoid bookMyShowFree(BookMyShow* obj) {\n\n}\n\n/**\n * Your BookMyShow struct will be instantiated and called as such:\n * BookMyShow* obj = bookMyShowCreate(n, m);\n * int* param_1 = bookMyShowGather(obj, k, maxRow, retSize);\n \n * bool param_2 = bookMyShowScatter(obj, k, maxRow);\n \n * bookMyShowFree(obj);\n*/", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class BookMyShow {\n\n public BookMyShow(int n, int m) {\n\n }\n \n public int[] Gather(int k, int maxRow) {\n\n }\n \n public bool Scatter(int k, int maxRow) {\n\n }\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * BookMyShow obj = new BookMyShow(n, m);\n * int[] param_1 = obj.Gather(k,maxRow);\n * bool param_2 = obj.Scatter(k,maxRow);\n */", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * @param {number} n\n * @param {number} m\n */\nvar BookMyShow = function(n, m) {\n\n};\n\n/** \n * @param {number} k \n * @param {number} maxRow\n * @return {number[]}\n */\nBookMyShow.prototype.gather = function(k, maxRow) {\n\n};\n\n/** \n * @param {number} k \n * @param {number} maxRow\n * @return {boolean}\n */\nBookMyShow.prototype.scatter = function(k, maxRow) {\n\n};\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * var obj = new BookMyShow(n, m)\n * var param_1 = obj.gather(k,maxRow)\n * var param_2 = obj.scatter(k,maxRow)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "class BookMyShow\n\n=begin\n :type n: Integer\n :type m: Integer\n=end\n def initialize(n, m)\n\n end\n\n\n=begin\n :type k: Integer\n :type max_row: Integer\n :rtype: Integer[]\n=end\n def gather(k, max_row)\n\n end\n\n\n=begin\n :type k: Integer\n :type max_row: Integer\n :rtype: Boolean\n=end\n def scatter(k, max_row)\n\n end\n\n\nend\n\n# Your BookMyShow object will be instantiated and called as such:\n# obj = BookMyShow.new(n, m)\n# param_1 = obj.gather(k, max_row)\n# param_2 = obj.scatter(k, max_row)", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "\nclass BookMyShow {\n\n init(_ n: Int, _ m: Int) {\n\n }\n \n func gather(_ k: Int, _ maxRow: Int) -> [Int] {\n\n }\n \n func scatter(_ k: Int, _ maxRow: Int) -> Bool {\n\n }\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * let obj = BookMyShow(n, m)\n * let ret_1: [Int] = obj.gather(k, maxRow)\n * let ret_2: Bool = obj.scatter(k, maxRow)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "type BookMyShow struct {\n\n}\n\n\nfunc Constructor(n int, m int) BookMyShow {\n\n}\n\n\nfunc (this *BookMyShow) Gather(k int, maxRow int) []int {\n\n}\n\n\nfunc (this *BookMyShow) Scatter(k int, maxRow int) bool {\n\n}\n\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * obj := Constructor(n, m);\n * param_1 := obj.Gather(k,maxRow);\n * param_2 := obj.Scatter(k,maxRow);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "class BookMyShow(_n: Int, _m: Int) {\n\n def gather(k: Int, maxRow: Int): Array[Int] = {\n\n }\n\n def scatter(k: Int, maxRow: Int): Boolean = {\n\n }\n\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * var obj = new BookMyShow(n, m)\n * var param_1 = obj.gather(k,maxRow)\n * var param_2 = obj.scatter(k,maxRow)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class BookMyShow(n: Int, m: Int) {\n\n fun gather(k: Int, maxRow: Int): IntArray {\n\n }\n\n fun scatter(k: Int, maxRow: Int): Boolean {\n\n }\n\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * var obj = BookMyShow(n, m)\n * var param_1 = obj.gather(k,maxRow)\n * var param_2 = obj.scatter(k,maxRow)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "struct BookMyShow {\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 BookMyShow {\n\n fn new(n: i32, m: i32) -> Self {\n\n }\n \n fn gather(&self, k: i32, max_row: i32) -> Vec {\n\n }\n \n fn scatter(&self, k: i32, max_row: i32) -> bool {\n\n }\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * let obj = BookMyShow::new(n, m);\n * let ret_1: Vec = obj.gather(k, maxRow);\n * let ret_2: bool = obj.scatter(k, maxRow);\n */", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class BookMyShow {\n /**\n * @param Integer $n\n * @param Integer $m\n */\n function __construct($n, $m) {\n\n }\n\n /**\n * @param Integer $k\n * @param Integer $maxRow\n * @return Integer[]\n */\n function gather($k, $maxRow) {\n\n }\n\n /**\n * @param Integer $k\n * @param Integer $maxRow\n * @return Boolean\n */\n function scatter($k, $maxRow) {\n\n }\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * $obj = BookMyShow($n, $m);\n * $ret_1 = $obj->gather($k, $maxRow);\n * $ret_2 = $obj->scatter($k, $maxRow);\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "class BookMyShow {\n constructor(n: number, m: number) {\n\n }\n\n gather(k: number, maxRow: number): number[] {\n\n }\n\n scatter(k: number, maxRow: number): boolean {\n\n }\n}\n\n/**\n * Your BookMyShow object will be instantiated and called as such:\n * var obj = new BookMyShow(n, m)\n * var param_1 = obj.gather(k,maxRow)\n * var param_2 = obj.scatter(k,maxRow)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "(define book-my-show%\n (class object%\n (super-new)\n \n ; n : exact-integer?\n ; m : exact-integer?\n (init-field\n n\n m)\n \n ; gather : exact-integer? exact-integer? -> (listof exact-integer?)\n (define/public (gather k max-row)\n\n )\n ; scatter : exact-integer? exact-integer? -> boolean?\n (define/public (scatter k max-row)\n\n )))\n\n;; Your book-my-show% object will be instantiated and called as such:\n;; (define obj (new book-my-show% [n n] [m m]))\n;; (define param_1 (send obj gather k max-row))\n;; (define param_2 (send obj scatter k max-row))", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec book_my_show_init_(N :: integer(), M :: integer()) -> any().\nbook_my_show_init_(N, M) ->\n .\n\n-spec book_my_show_gather(K :: integer(), MaxRow :: integer()) -> [integer()].\nbook_my_show_gather(K, MaxRow) ->\n .\n\n-spec book_my_show_scatter(K :: integer(), MaxRow :: integer()) -> boolean().\nbook_my_show_scatter(K, MaxRow) ->\n .\n\n\n%% Your functions will be called as such:\n%% book_my_show_init_(N, M),\n%% Param_1 = book_my_show_gather(K, MaxRow),\n%% Param_2 = book_my_show_scatter(K, MaxRow),\n\n%% book_my_show_init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule BookMyShow do\n @spec init_(n :: integer, m :: integer) :: any\n def init_(n, m) do\n\n end\n\n @spec gather(k :: integer, max_row :: integer) :: [integer]\n def gather(k, max_row) do\n\n end\n\n @spec scatter(k :: integer, max_row :: integer) :: boolean\n def scatter(k, max_row) do\n\n end\nend\n\n# Your functions will be called as such:\n# BookMyShow.init_(n, m)\n# param_1 = BookMyShow.gather(k, max_row)\n# param_2 = BookMyShow.scatter(k, max_row)\n\n# BookMyShow.init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"2K\", \"totalSubmission\": \"9.9K\", \"totalAcceptedRaw\": 1972, \"totalSubmissionRaw\": 9865, \"acRate\": \"20.0%\"}", "hints": [ "Since seats are allocated by smallest row and then by smallest seat numbers, how can we keep a record of the smallest seat number vacant in each row?", "How can range max query help us to check if contiguous seats can be allocated in a range?", "Similarly, can range sum query help us to check if enough seats are available in a range?", "Which data structure can be used to implement the above?" ], "solution": null, "status": null, "sampleTestCase": "[\"BookMyShow\",\"gather\",\"gather\",\"scatter\",\"scatter\"]\n[[2,5],[4,0],[2,0],[5,1],[5,1]]", "metaData": "{\n \"classname\": \"BookMyShow\",\n \"constructor\": {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"n\"\n },\n {\n \"type\": \"integer\",\n \"name\": \"m\"\n }\n ]\n },\n \"methods\": [\n {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"k\"\n },\n {\n \"type\": \"integer\",\n \"name\": \"maxRow\"\n }\n ],\n \"name\": \"gather\",\n \"return\": {\n \"type\": \"integer[]\"\n }\n },\n {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"k\"\n },\n {\n \"type\": \"integer\",\n \"name\": \"maxRow\"\n }\n ],\n \"name\": \"scatter\",\n \"return\": {\n \"type\": \"boolean\"\n }\n }\n ],\n \"return\": {\n \"type\": \"boolean\"\n },\n \"systemdesign\": true\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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