{ "data": { "question": { "questionId": "885", "questionFrontendId": "855", "categoryTitle": "Algorithms", "boundTopicId": 1738, "title": "Exam Room", "titleSlug": "exam-room", "content": "

There is an exam room with n seats in a single row labeled from 0 to n - 1.

\n\n

When a student enters the room, they must sit in the seat that maximizes the distance to the closest person. If there are multiple such seats, they sit in the seat with the lowest number. If no one is in the room, then the student sits at seat number 0.

\n\n

Design a class that simulates the mentioned exam room.

\n\n

Implement the ExamRoom class:

\n\n\n\n

 

\n

Example 1:

\n\n
\nInput\n["ExamRoom", "seat", "seat", "seat", "seat", "leave", "seat"]\n[[10], [], [], [], [], [4], []]\nOutput\n[null, 0, 9, 4, 2, null, 5]\n\nExplanation\nExamRoom examRoom = new ExamRoom(10);\nexamRoom.seat(); // return 0, no one is in the room, then the student sits at seat number 0.\nexamRoom.seat(); // return 9, the student sits at the last seat number 9.\nexamRoom.seat(); // return 4, the student sits at the last seat number 4.\nexamRoom.seat(); // return 2, the student sits at the last seat number 2.\nexamRoom.leave(4);\nexamRoom.seat(); // return 5, the student sits at the last seat number 5.\n\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "考场就座", "translatedContent": "

在考场里，一排有 N 个座位，分别编号为 0, 1, 2, ..., N-1 。

\n\n

当学生进入考场后，他必须坐在能够使他与离他最近的人之间的距离达到最大化的座位上。如果有多个这样的座位，他会坐在编号最小的座位上。(另外，如果考场里没有人，那么学生就坐在 0 号座位上。)

\n\n

返回 ExamRoom(int N) 类，它有两个公开的函数：其中，函数 ExamRoom.seat() 会返回一个 int （整型数据），代表学生坐的位置；函数 ExamRoom.leave(int p) 代表坐在座位 p 上的学生现在离开了考场。每次调用 ExamRoom.leave(p) 时都保证有学生坐在座位 p 上。

\n\n

 

\n\n

示例：

\n\n
输入：["ExamRoom","seat","seat","seat","seat","leave","seat"], [[10],[],[],[],[],[4],[]]\n输出：[null,0,9,4,2,null,5]\n解释：\nExamRoom(10) -> null\nseat() -> 0，没有人在考场里，那么学生坐在 0 号座位上。\nseat() -> 9，学生最后坐在 9 号座位上。\nseat() -> 4，学生最后坐在 4 号座位上。\nseat() -> 2，学生最后坐在 2 号座位上。\nleave(4) -> null\nseat() -> 5，学生最后坐在 5 号座位上。\n
\n\n

 

\n\n

提示：

\n\n
    \n\t
  1. 1 <= N <= 10^9
    2. \n\t
  2. 在所有的测试样例中 ExamRoom.seat() 和 ExamRoom.leave() 最多被调用 10^4 次。
    3. \n\t
  3. 保证在调用 ExamRoom.leave(p) 时有学生正坐在座位 p 上。
    4. \n
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"ordered-set", "translatedName": "有序集合", "__typename": "TopicTagNode" } ], "companyTagStats": null, "codeSnippets": [ { "lang": "C++", "langSlug": "cpp", "code": "class ExamRoom {\npublic:\n ExamRoom(int n) {\n\n }\n \n int seat() {\n\n }\n \n void leave(int p) {\n\n }\n};\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * ExamRoom* obj = new ExamRoom(n);\n * int param_1 = obj->seat();\n * obj->leave(p);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Java", "langSlug": "java", "code": "class ExamRoom {\n\n public ExamRoom(int n) {\n\n }\n \n public int seat() {\n\n }\n \n public void leave(int p) {\n\n }\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * ExamRoom obj = new ExamRoom(n);\n * int param_1 = obj.seat();\n * obj.leave(p);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "class ExamRoom(object):\n\n def __init__(self, n):\n \"\"\"\n :type n: int\n \"\"\"\n\n\n def seat(self):\n \"\"\"\n :rtype: int\n \"\"\"\n\n\n def leave(self, p):\n \"\"\"\n :type p: int\n :rtype: None\n \"\"\"\n\n\n\n# Your ExamRoom object will be instantiated and called as such:\n# obj = ExamRoom(n)\n# param_1 = obj.seat()\n# obj.leave(p)", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "class ExamRoom:\n\n def __init__(self, n: int):\n\n\n def seat(self) -> int:\n\n\n def leave(self, p: int) -> None:\n\n\n\n# Your ExamRoom object will be instantiated and called as such:\n# obj = ExamRoom(n)\n# param_1 = obj.seat()\n# obj.leave(p)", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "\n\n\ntypedef struct {\n\n} ExamRoom;\n\n\nExamRoom* examRoomCreate(int n) {\n\n}\n\nint examRoomSeat(ExamRoom* obj) {\n\n}\n\nvoid examRoomLeave(ExamRoom* obj, int p) {\n\n}\n\nvoid examRoomFree(ExamRoom* obj) {\n\n}\n\n/**\n * Your ExamRoom struct will be instantiated and called as such:\n * ExamRoom* obj = examRoomCreate(n);\n * int param_1 = examRoomSeat(obj);\n \n * examRoomLeave(obj, p);\n \n * examRoomFree(obj);\n*/", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class ExamRoom {\n\n public ExamRoom(int n) {\n\n }\n \n public int Seat() {\n\n }\n \n public void Leave(int p) {\n\n }\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * ExamRoom obj = new ExamRoom(n);\n * int param_1 = obj.Seat();\n * obj.Leave(p);\n */", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * @param {number} n\n */\nvar ExamRoom = function(n) {\n\n};\n\n/**\n * @return {number}\n */\nExamRoom.prototype.seat = function() {\n\n};\n\n/** \n * @param {number} p\n * @return {void}\n */\nExamRoom.prototype.leave = function(p) {\n\n};\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * var obj = new ExamRoom(n)\n * var param_1 = obj.seat()\n * obj.leave(p)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "class ExamRoom\n\n=begin\n :type n: Integer\n=end\n def initialize(n)\n\n end\n\n\n=begin\n :rtype: Integer\n=end\n def seat()\n\n end\n\n\n=begin\n :type p: Integer\n :rtype: Void\n=end\n def leave(p)\n\n end\n\n\nend\n\n# Your ExamRoom object will be instantiated and called as such:\n# obj = ExamRoom.new(n)\n# param_1 = obj.seat()\n# obj.leave(p)", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "\nclass ExamRoom {\n\n init(_ n: Int) {\n\n }\n \n func seat() -> Int {\n\n }\n \n func leave(_ p: Int) {\n\n }\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * let obj = ExamRoom(n)\n * let ret_1: Int = obj.seat()\n * obj.leave(p)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "type ExamRoom struct {\n\n}\n\n\nfunc Constructor(n int) ExamRoom {\n\n}\n\n\nfunc (this *ExamRoom) Seat() int {\n\n}\n\n\nfunc (this *ExamRoom) Leave(p int) {\n\n}\n\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * obj := Constructor(n);\n * param_1 := obj.Seat();\n * obj.Leave(p);\n */", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "class ExamRoom(_n: Int) {\n\n def seat(): Int = {\n\n }\n\n def leave(p: Int) {\n\n }\n\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * var obj = new ExamRoom(n)\n * var param_1 = obj.seat()\n * obj.leave(p)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class ExamRoom(n: Int) {\n\n fun seat(): Int {\n\n }\n\n fun leave(p: Int) {\n\n }\n\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * var obj = ExamRoom(n)\n * var param_1 = obj.seat()\n * obj.leave(p)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "struct ExamRoom {\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 ExamRoom {\n\n fn new(n: i32) -> Self {\n\n }\n \n fn seat(&self) -> i32 {\n\n }\n \n fn leave(&self, p: i32) {\n\n }\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * let obj = ExamRoom::new(n);\n * let ret_1: i32 = obj.seat();\n * obj.leave(p);\n */", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class ExamRoom {\n /**\n * @param Integer $n\n */\n function __construct($n) {\n\n }\n\n /**\n * @return Integer\n */\n function seat() {\n\n }\n\n /**\n * @param Integer $p\n * @return NULL\n */\n function leave($p) {\n\n }\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * $obj = ExamRoom($n);\n * $ret_1 = $obj->seat();\n * $obj->leave($p);\n */", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "class ExamRoom {\n constructor(n: number) {\n\n }\n\n seat(): number {\n\n }\n\n leave(p: number): void {\n\n }\n}\n\n/**\n * Your ExamRoom object will be instantiated and called as such:\n * var obj = new ExamRoom(n)\n * var param_1 = obj.seat()\n * obj.leave(p)\n */", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "(define exam-room%\n (class object%\n (super-new)\n\n ; n : exact-integer?\n (init-field\n n)\n \n ; seat : -> exact-integer?\n (define/public (seat)\n\n )\n ; leave : exact-integer? -> void?\n (define/public (leave p)\n\n )))\n\n;; Your exam-room% object will be instantiated and called as such:\n;; (define obj (new exam-room% [n n]))\n;; (define param_1 (send obj seat))\n;; (send obj leave p)", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec exam_room_init_(N :: integer()) -> any().\nexam_room_init_(N) ->\n .\n\n-spec exam_room_seat() -> integer().\nexam_room_seat() ->\n .\n\n-spec exam_room_leave(P :: integer()) -> any().\nexam_room_leave(P) ->\n .\n\n\n%% Your functions will be called as such:\n%% exam_room_init_(N),\n%% Param_1 = exam_room_seat(),\n%% exam_room_leave(P),\n\n%% exam_room_init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule ExamRoom do\n @spec init_(n :: integer) :: any\n def init_(n) do\n\n end\n\n @spec seat() :: integer\n def seat() do\n\n end\n\n @spec leave(p :: integer) :: any\n def leave(p) do\n\n end\nend\n\n# Your functions will be called as such:\n# ExamRoom.init_(n)\n# param_1 = ExamRoom.seat()\n# ExamRoom.leave(p)\n\n# ExamRoom.init_ will be called before every test case, in which you can do some necessary initializations.", "__typename": "CodeSnippetNode" } ], "stats": "{\"totalAccepted\": \"6.8K\", \"totalSubmission\": \"16.7K\", \"totalAcceptedRaw\": 6850, \"totalSubmissionRaw\": 16688, \"acRate\": \"41.0%\"}", "hints": [], "solution": null, "status": null, "sampleTestCase": "[\"ExamRoom\",\"seat\",\"seat\",\"seat\",\"seat\",\"leave\",\"seat\"]\n[[10],[],[],[],[],[4],[]]", "metaData": "{\n \"classname\": \"ExamRoom\",\n \"maxbytesperline\": 200000,\n \"constructor\": {\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"n\"\n }\n ]\n },\n \"methods\": [\n {\n \"name\": \"seat\",\n \"params\": [],\n \"return\": {\n \"type\": \"integer\"\n }\n },\n {\n \"name\": \"leave\",\n \"params\": [\n {\n \"type\": \"integer\",\n \"name\": \"p\"\n }\n ],\n \"return\": {\n \"type\": \"void\"\n }\n }\n ],\n \"systemdesign\": true,\n \"params\": [\n {\n \"name\": \"inputs\",\n \"type\": \"integer[]\"\n },\n {\n \"name\": \"inputs\",\n \"type\": \"integer[]\"\n }\n ],\n \"return\": {\n \"type\": \"list\",\n \"dealloc\": true\n }\n}", "judgerAvailable": true, "judgeType": "large", "mysqlSchemas": [], "enableRunCode": true, "envInfo": "{\"cpp\":[\"C++\",\"

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\\u5982\\u9700\\u4f7f\\u7528 Map\\/TreeMap \\u6570\\u636e\\u7ed3\\u6784\\uff0c\\u60a8\\u53ef\\u4f7f\\u7528 sortedcontainers<\\/a> \\u5e93\\u3002<\\/p>\"],\"scala\":[\"Scala\",\"
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PHP 8.1<\\/code>.<\\/p>\\r\\n\\r\\n
With bcmath module.<\\/p>\"],\"typescript\":[\"TypeScript\",\"
TypeScript 4.5.4<\\/p>\\r\\n\\r\\n
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