"content":"<p>Design a system that manages the reservation state of <code>n</code> seats that are numbered from <code>1</code> to <code>n</code>.</p>\n\n<p>Implement the <code>SeatManager</code> class:</p>\n\n<ul>\n\t<li><code>SeatManager(int n)</code> Initializes a <code>SeatManager</code> object that will manage <code>n</code> seats numbered from <code>1</code> to <code>n</code>. All seats are initially available.</li>\n\t<li><code>int reserve()</code> Fetches the <strong>smallest-numbered</strong> unreserved seat, reserves it, and returns its number.</li>\n\t<li><code>void unreserve(int seatNumber)</code> Unreserves the seat with the given <code>seatNumber</code>.</li>\n</ul>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["SeatManager", "reserve", "reserve", "unreserve", "reserve", "reserve", "reserve", "reserve", "unreserve"]\n[[5], [], [], [2], [], [], [], [], [5]]\n<strong>Output</strong>\n[null, 1, 2, null, 2, 3, 4, 5, null]\n\n<strong>Explanation</strong>\nSeatManager seatManager = new SeatManager(5); // Initializes a SeatManager with 5 seats.\nseatManager.reserve(); // All seats are available, so return the lowest numbered seat, which is 1.\nseatManager.reserve(); // The available seats are [2,3,4,5], so return the lowest of them, which is 2.\nseatManager.unreserve(2); // Unreserve seat 2, so now the available seats are [2,3,4,5].\nseatManager.reserve(); // The available seats are [2,3,4,5], so return the lowest of them, which is 2.\nseatManager.reserve(); // The available seats are [3,4,5], so return the lowest of them, which is 3.\nseatManager.reserve(); // The available seats are [4,5], so return the lowest of them, which is 4.\nseatManager.reserve(); // The only available seat is seat 5, so return 5.\nseatManager.unreserve(5); // Unreserve seat 5, so now the available seats are [5].\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= n <= 10<sup>5</sup></code></li>\n\t<li><code>1 <= seatNumber <= n</code></li>\n\t<li>For each call to <code>reserve</code>, it is guaranteed that there will be at least one unreserved seat.</li>\n\t<li>For each call to <code>unreserve</code>, it is guaranteed that <code>seatNumber</code> will be reserved.</li>\n\t<li>At most <code>10<sup>5</sup></code> calls <strong>in total</strong> will be made to <code>reserve</code> and <code>unreserve</code>.</li>\n</ul>\n",
"code":"class SeatManager {\npublic:\n SeatManager(int n) {\n \n }\n \n int reserve() {\n \n }\n \n void unreserve(int seatNumber) {\n \n }\n};\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * SeatManager* obj = new SeatManager(n);\n * int param_1 = obj->reserve();\n * obj->unreserve(seatNumber);\n */",
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"lang":"Java",
"langSlug":"java",
"code":"class SeatManager {\n\n public SeatManager(int n) {\n \n }\n \n public int reserve() {\n \n }\n \n public void unreserve(int seatNumber) {\n \n }\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * SeatManager obj = new SeatManager(n);\n * int param_1 = obj.reserve();\n * obj.unreserve(seatNumber);\n */",
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{
"lang":"Python",
"langSlug":"python",
"code":"class SeatManager(object):\n\n def __init__(self, n):\n \"\"\"\n :type n: int\n \"\"\"\n \n\n def reserve(self):\n \"\"\"\n :rtype: int\n \"\"\"\n \n\n def unreserve(self, seatNumber):\n \"\"\"\n :type seatNumber: int\n :rtype: None\n \"\"\"\n \n\n\n# Your SeatManager object will be instantiated and called as such:\n# obj = SeatManager(n)\n# param_1 = obj.reserve()\n# obj.unreserve(seatNumber)",
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{
"lang":"Python3",
"langSlug":"python3",
"code":"class SeatManager:\n\n def __init__(self, n: int):\n \n\n def reserve(self) -> int:\n \n\n def unreserve(self, seatNumber: int) -> None:\n \n\n\n# Your SeatManager object will be instantiated and called as such:\n# obj = SeatManager(n)\n# param_1 = obj.reserve()\n# obj.unreserve(seatNumber)",
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{
"lang":"C",
"langSlug":"c",
"code":"\n\n\ntypedef struct {\n \n} SeatManager;\n\n\nSeatManager* seatManagerCreate(int n) {\n \n}\n\nint seatManagerReserve(SeatManager* obj) {\n \n}\n\nvoid seatManagerUnreserve(SeatManager* obj, int seatNumber) {\n \n}\n\nvoid seatManagerFree(SeatManager* obj) {\n \n}\n\n/**\n * Your SeatManager struct will be instantiated and called as such:\n * SeatManager* obj = seatManagerCreate(n);\n * int param_1 = seatManagerReserve(obj);\n \n * seatManagerUnreserve(obj, seatNumber);\n \n * seatManagerFree(obj);\n*/",
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{
"lang":"C#",
"langSlug":"csharp",
"code":"public class SeatManager {\n\n public SeatManager(int n) {\n \n }\n \n public int Reserve() {\n \n }\n \n public void Unreserve(int seatNumber) {\n \n }\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * SeatManager obj = new SeatManager(n);\n * int param_1 = obj.Reserve();\n * obj.Unreserve(seatNumber);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"JavaScript",
"langSlug":"javascript",
"code":"/**\n * @param {number} n\n */\nvar SeatManager = function(n) {\n \n};\n\n/**\n * @return {number}\n */\nSeatManager.prototype.reserve = function() {\n \n};\n\n/** \n * @param {number} seatNumber\n * @return {void}\n */\nSeatManager.prototype.unreserve = function(seatNumber) {\n \n};\n\n/** \n * Your SeatManager object will be instantiated and called as such:\n * var obj = new SeatManager(n)\n * var param_1 = obj.reserve()\n * obj.unreserve(seatNumber)\n */",
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{
"lang":"Ruby",
"langSlug":"ruby",
"code":"class SeatManager\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 reserve()\n \n end\n\n\n=begin\n :type seat_number: Integer\n :rtype: Void\n=end\n def unreserve(seat_number)\n \n end\n\n\nend\n\n# Your SeatManager object will be instantiated and called as such:\n# obj = SeatManager.new(n)\n# param_1 = obj.reserve()\n# obj.unreserve(seat_number)",
"__typename":"CodeSnippetNode"
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{
"lang":"Swift",
"langSlug":"swift",
"code":"\nclass SeatManager {\n\n init(_ n: Int) {\n \n }\n \n func reserve() -> Int {\n \n }\n \n func unreserve(_ seatNumber: Int) {\n \n }\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * let obj = SeatManager(n)\n * let ret_1: Int = obj.reserve()\n * obj.unreserve(seatNumber)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Go",
"langSlug":"golang",
"code":"type SeatManager struct {\n \n}\n\n\nfunc Constructor(n int) SeatManager {\n \n}\n\n\nfunc (this *SeatManager) Reserve() int {\n \n}\n\n\nfunc (this *SeatManager) Unreserve(seatNumber int) {\n \n}\n\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * obj := Constructor(n);\n * param_1 := obj.Reserve();\n * obj.Unreserve(seatNumber);\n */",
"__typename":"CodeSnippetNode"
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{
"lang":"Scala",
"langSlug":"scala",
"code":"class SeatManager(_n: Int) {\n\n def reserve(): Int = {\n \n }\n\n def unreserve(seatNumber: Int) {\n \n }\n\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * var obj = new SeatManager(n)\n * var param_1 = obj.reserve()\n * obj.unreserve(seatNumber)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Kotlin",
"langSlug":"kotlin",
"code":"class SeatManager(n: Int) {\n\n fun reserve(): Int {\n \n }\n\n fun unreserve(seatNumber: Int) {\n \n }\n\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * var obj = SeatManager(n)\n * var param_1 = obj.reserve()\n * obj.unreserve(seatNumber)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Rust",
"langSlug":"rust",
"code":"struct SeatManager {\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 SeatManager {\n\n fn new(n: i32) -> Self {\n \n }\n \n fn reserve(&self) -> i32 {\n \n }\n \n fn unreserve(&self, seat_number: i32) {\n \n }\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * let obj = SeatManager::new(n);\n * let ret_1: i32 = obj.reserve();\n * obj.unreserve(seatNumber);\n */",
"__typename":"CodeSnippetNode"
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{
"lang":"PHP",
"langSlug":"php",
"code":"class SeatManager {\n /**\n * @param Integer $n\n */\n function __construct($n) {\n \n }\n \n /**\n * @return Integer\n */\n function reserve() {\n \n }\n \n /**\n * @param Integer $seatNumber\n * @return NULL\n */\n function unreserve($seatNumber) {\n \n }\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * $obj = SeatManager($n);\n * $ret_1 = $obj->reserve();\n * $obj->unreserve($seatNumber);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"TypeScript",
"langSlug":"typescript",
"code":"class SeatManager {\n constructor(n: number) {\n\n }\n\n reserve(): number {\n\n }\n\n unreserve(seatNumber: number): void {\n\n }\n}\n\n/**\n * Your SeatManager object will be instantiated and called as such:\n * var obj = new SeatManager(n)\n * var param_1 = obj.reserve()\n * obj.unreserve(seatNumber)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Racket",
"langSlug":"racket",
"code":"(define seat-manager%\n (class object%\n (super-new)\n\n ; n : exact-integer?\n (init-field\n n)\n \n ; reserve : -> exact-integer?\n (define/public (reserve)\n\n )\n ; unreserve : exact-integer? -> void?\n (define/public (unreserve seat-number)\n\n )))\n\n;; Your seat-manager% object will be instantiated and called as such:\n;; (define obj (new seat-manager% [n n]))\n;; (define param_1 (send obj reserve))\n;; (send obj unreserve seat-number)",
"__typename":"CodeSnippetNode"
},
{
"lang":"Erlang",
"langSlug":"erlang",
"code":"-spec seat_manager_init_(N :: integer()) -> any().\nseat_manager_init_(N) ->\n .\n\n-spec seat_manager_reserve() -> integer().\nseat_manager_reserve() ->\n .\n\n-spec seat_manager_unreserve(SeatNumber :: integer()) -> any().\nseat_manager_unreserve(SeatNumber) ->\n .\n\n\n%% Your functions will be called as such:\n%% seat_manager_init_(N),\n%% Param_1 = seat_manager_reserve(),\n%% seat_manager_unreserve(SeatNumber),\n\n%% seat_manager_init_ will be called before every test case, in which you can do some necessary initializations.",
"__typename":"CodeSnippetNode"
},
{
"lang":"Elixir",
"langSlug":"elixir",
"code":"defmodule SeatManager do\n @spec init_(n :: integer) :: any\n def init_(n) do\n\n end\n\n @spec reserve() :: integer\n def reserve() do\n\n end\n\n @spec unreserve(seat_number :: integer) :: any\n def unreserve(seat_number) do\n\n end\nend\n\n# Your functions will be called as such:\n# SeatManager.init_(n)\n# param_1 = SeatManager.reserve()\n# SeatManager.unreserve(seat_number)\n\n# SeatManager.init_ will be called before every test case, in which you can do some necessary initializations.",
"You need a data structure that maintains the states of the seats. This data structure should also allow you to get the first available seat and flip the state of a seat in a reasonable time.",
"You can let the data structure contain the available seats. Then you want to be able to get the lowest element and erase an element, in a reasonable time.",
"envInfo":"{\"cpp\": [\"C++\", \"<p>Compiled with <code> clang 11 </code> using the latest C++ 17 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level two optimization (<code>-O2</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\"], \"java\": [\"Java\", \"<p><code> OpenJDK 17 </code>. Java 8 features such as lambda expressions and stream API can be used. </p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n<p>Includes <code>Pair</code> class from https://docs.oracle.com/javase/8/javafx/api/javafx/util/Pair.html.</p>\"], \"python\": [\"Python\", \"<p><code>Python 2.7.12</code>.</p>\\r\\n\\r\\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\\\"https://docs.python.org/2/library/array.html\\\" target=\\\"_blank\\\">array</a>, <a href=\\\"https://docs.python.org/2/library/bisect.html\\\" target=\\\"_blank\\\">bisect</a>, <a href=\\\"https://docs.python.org/2/library/collections.html\\\" target=\\\"_blank\\\">collections</a>. If you need more libraries, you can import it yourself.</p>\\r\\n\\r\\n<p>For Map/TreeMap data structure, you may use <a href=\\\"http://www.grantjenks.com/docs/sortedcontainers/\\\" target=\\\"_blank\\\">sortedcontainers</a> library.</p>\\r\\n\\r\\n<p>Note that Python 2.7 <a href=\\\"https://www.python.org/dev/peps/pep-0373/\\\" target=\\\"_blank\\\">will not be maintained past 2020</a>. For the latest Python, please choose Python3 instead.</p>\"], \"c\": [\"C\", \"<p>Compiled with <code>gcc 8.2</code> using the gnu99 standard.</p>\\r\\n\\r\\n<p>Your code is compiled with level one optimization (<code>-O1</code>). <a href=\\\"https://github.com/google/sanitizers/wiki/AddressSanitizer\\\" target=\\\"_blank\\\">AddressSanitizer</a> is also enabled to help detect out-of-bounds and use-after-free bugs.</p>\\r\\n\\r\\n<p>Most standard library headers are already included automatically for your convenience.</p>\\r\\n\\r\\n<p>For hash table operations, you may use <a href=\\\"https://troydhanson.github.io/uthash/\\\" target=\\\"_blank\\\">uthash</a>. \\\"uthash.h\\\" is included by default. Below are some examples:</p>\\r\\n\\r\\n<p><b>1. Adding an item to a hash.</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 *s) {\\r\\n HASH_ADD_INT(users, id, s);\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>2. Looking up an item in a hash:</b>\\r\\n<pre>\\r\\nstruct hash_entry *find_user(int user_id) {\\r\\n struct hash_entry *s;\\r\\n HASH_FIND_INT(users, &user_id, s);\\r\\n return s;\\r\\n}\\r\\n</pre>\\r\\n</p>\\r\\n\\r\\n<p><b>3. Deleting an item in a hash:</b>\\r\\n<pre>\\r\\nvoid delete_user(struct hash_entry *user) {\\r\\n HASH_DEL(users, user); \\r\\n}\\r\\n</pre>\\r\\n</p>\"], \"csharp\": [\"C#\", \"<p><a href=\\\"https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9\\\" target=\\\"_blank\\\">C# 10 with .NET 6 runtime</a></p>\\r\\n\\r\\n<p>Your code is compiled with debug flag enabled (<code>/debug</code>).</p>\"], \"javascript\": [\"JavaScript\", \"<p><code>Node.js 16.13.2</code>.</p>\\r\\n\\r\\n<p>Your code is run with <code>--harmony</code> flag, enabling <a href=\\\"http://node.green/\\\" target=\\\"_blank\\\">new ES6 features</a>.</p>\\r\\n\\r\\n<p><a href=\\\"https://lodash.com\\\" target=\\\"_blank\\\">lodash.js</a> library is included by default.</p>\\r\\n\\r\\n<p>For Priority Queue / Queue data structures, you may use <a href=\\\"https://github.com/datastructures-js/priority-queue\\\" target=\\\"_blank\\\">datastructures-js/priority-queue</a> and <a href=\\\"https:
