"content":"<p>You have a <code>RecentCounter</code> class which counts the number of recent requests within a certain time frame.</p>\n\n<p>Implement the <code>RecentCounter</code> class:</p>\n\n<ul>\n\t<li><code>RecentCounter()</code> Initializes the counter with zero recent requests.</li>\n\t<li><code>int ping(int t)</code> Adds a new request at time <code>t</code>, where <code>t</code> represents some time in milliseconds, and returns the number of requests that has happened in the past <code>3000</code> milliseconds (including the new request). Specifically, return the number of requests that have happened in the inclusive range <code>[t - 3000, t]</code>.</li>\n</ul>\n\n<p>It is <strong>guaranteed</strong> that every call to <code>ping</code> uses a strictly larger value of <code>t</code> than the previous call.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input</strong>\n["RecentCounter", "ping", "ping", "ping", "ping"]\n[[], [1], [100], [3001], [3002]]\n<strong>Output</strong>\n[null, 1, 2, 3, 3]\n\n<strong>Explanation</strong>\nRecentCounter recentCounter = new RecentCounter();\nrecentCounter.ping(1); // requests = [<u>1</u>], range is [-2999,1], return 1\nrecentCounter.ping(100); // requests = [<u>1</u>, <u>100</u>], range is [-2900,100], return 2\nrecentCounter.ping(3001); // requests = [<u>1</u>, <u>100</u>, <u>3001</u>], range is [1,3001], return 3\nrecentCounter.ping(3002); // requests = [1, <u>100</u>, <u>3001</u>, <u>3002</u>], range is [2,3002], return 3\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= t <= 10<sup>9</sup></code></li>\n\t<li>Each test case will call <code>ping</code> with <strong>strictly increasing</strong> values of <code>t</code>.</li>\n\t<li>At most <code>10<sup>4</sup></code> calls will be made to <code>ping</code>.</li>\n</ul>\n",
"code":"class RecentCounter {\npublic:\n RecentCounter() {\n \n }\n \n int ping(int t) {\n \n }\n};\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * RecentCounter* obj = new RecentCounter();\n * int param_1 = obj->ping(t);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Java",
"langSlug":"java",
"code":"class RecentCounter {\n\n public RecentCounter() {\n \n }\n \n public int ping(int t) {\n \n }\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * RecentCounter obj = new RecentCounter();\n * int param_1 = obj.ping(t);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python",
"langSlug":"python",
"code":"class RecentCounter(object):\n\n def __init__(self):\n \n\n def ping(self, t):\n \"\"\"\n :type t: int\n :rtype: int\n \"\"\"\n \n\n\n# Your RecentCounter object will be instantiated and called as such:\n# obj = RecentCounter()\n# param_1 = obj.ping(t)",
"__typename":"CodeSnippetNode"
},
{
"lang":"Python3",
"langSlug":"python3",
"code":"class RecentCounter:\n\n def __init__(self):\n \n\n def ping(self, t: int) -> int:\n \n\n\n# Your RecentCounter object will be instantiated and called as such:\n# obj = RecentCounter()\n# param_1 = obj.ping(t)",
"__typename":"CodeSnippetNode"
},
{
"lang":"C",
"langSlug":"c",
"code":"\n\n\ntypedef struct {\n \n} RecentCounter;\n\n\nRecentCounter* recentCounterCreate() {\n \n}\n\nint recentCounterPing(RecentCounter* obj, int t) {\n \n}\n\nvoid recentCounterFree(RecentCounter* obj) {\n \n}\n\n/**\n * Your RecentCounter struct will be instantiated and called as such:\n * RecentCounter* obj = recentCounterCreate();\n * int param_1 = recentCounterPing(obj, t);\n \n * recentCounterFree(obj);\n*/",
"__typename":"CodeSnippetNode"
},
{
"lang":"C#",
"langSlug":"csharp",
"code":"public class RecentCounter {\n\n public RecentCounter() {\n \n }\n \n public int Ping(int t) {\n \n }\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * RecentCounter obj = new RecentCounter();\n * int param_1 = obj.Ping(t);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"JavaScript",
"langSlug":"javascript",
"code":"\nvar RecentCounter = function() {\n \n};\n\n/** \n * @param {number} t\n * @return {number}\n */\nRecentCounter.prototype.ping = function(t) {\n \n};\n\n/** \n * Your RecentCounter object will be instantiated and called as such:\n * var obj = new RecentCounter()\n * var param_1 = obj.ping(t)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Ruby",
"langSlug":"ruby",
"code":"class RecentCounter\n def initialize()\n \n end\n\n\n=begin\n :type t: Integer\n :rtype: Integer\n=end\n def ping(t)\n \n end\n\n\nend\n\n# Your RecentCounter object will be instantiated and called as such:\n# obj = RecentCounter.new()\n# param_1 = obj.ping(t)",
"__typename":"CodeSnippetNode"
},
{
"lang":"Swift",
"langSlug":"swift",
"code":"\nclass RecentCounter {\n\n init() {\n \n }\n \n func ping(_ t: Int) -> Int {\n \n }\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * let obj = RecentCounter()\n * let ret_1: Int = obj.ping(t)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Go",
"langSlug":"golang",
"code":"type RecentCounter struct {\n \n}\n\n\nfunc Constructor() RecentCounter {\n \n}\n\n\nfunc (this *RecentCounter) Ping(t int) int {\n \n}\n\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * obj := Constructor();\n * param_1 := obj.Ping(t);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Scala",
"langSlug":"scala",
"code":"class RecentCounter() {\n\n def ping(t: Int): Int = {\n \n }\n\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * var obj = new RecentCounter()\n * var param_1 = obj.ping(t)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Kotlin",
"langSlug":"kotlin",
"code":"class RecentCounter() {\n\n fun ping(t: Int): Int {\n \n }\n\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * var obj = RecentCounter()\n * var param_1 = obj.ping(t)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Rust",
"langSlug":"rust",
"code":"struct RecentCounter {\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 RecentCounter {\n\n fn new() -> Self {\n \n }\n \n fn ping(&self, t: i32) -> i32 {\n \n }\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * let obj = RecentCounter::new();\n * let ret_1: i32 = obj.ping(t);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"PHP",
"langSlug":"php",
"code":"class RecentCounter {\n /**\n */\n function __construct() {\n \n }\n \n /**\n * @param Integer $t\n * @return Integer\n */\n function ping($t) {\n \n }\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * $obj = RecentCounter();\n * $ret_1 = $obj->ping($t);\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"TypeScript",
"langSlug":"typescript",
"code":"class RecentCounter {\n constructor() {\n\n }\n\n ping(t: number): number {\n\n }\n}\n\n/**\n * Your RecentCounter object will be instantiated and called as such:\n * var obj = new RecentCounter()\n * var param_1 = obj.ping(t)\n */",
"__typename":"CodeSnippetNode"
},
{
"lang":"Racket",
"langSlug":"racket",
"code":"(define recent-counter%\n (class object%\n (super-new)\n (init-field)\n \n ; ping : exact-integer? -> exact-integer?\n (define/public (ping t)\n\n )))\n\n;; Your recent-counter% object will be instantiated and called as such:\n;; (define obj (new recent-counter%))\n;; (define param_1 (send obj ping t))",
"__typename":"CodeSnippetNode"
},
{
"lang":"Erlang",
"langSlug":"erlang",
"code":"-spec recent_counter_init_() -> any().\nrecent_counter_init_() ->\n .\n\n-spec recent_counter_ping(T :: integer()) -> integer().\nrecent_counter_ping(T) ->\n .\n\n\n%% Your functions will be called as such:\n%% recent_counter_init_(),\n%% Param_1 = recent_counter_ping(T),\n\n%% recent_counter_init_ will be called before every test case, in which you can do some necessary initializations.",
"__typename":"CodeSnippetNode"
},
{
"lang":"Elixir",
"langSlug":"elixir",
"code":"defmodule RecentCounter do\n @spec init_() :: any\n def init_() do\n\n end\n\n @spec ping(t :: integer) :: integer\n def ping(t) do\n\n end\nend\n\n# Your functions will be called as such:\n# RecentCounter.init_()\n# param_1 = RecentCounter.ping(t)\n\n# RecentCounter.init_ will be called before every test case, in which you can do some necessary initializations.",
"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:
