Online Stock Span
<p>Design an algorithm that collects daily price quotes for some stock and returns <strong>the span</strong> of that stock&#39;s price for the current day.</p>

<p>The <strong>span</strong> of the stock&#39;s price in one day is the maximum number of consecutive days (starting from that day and going backward) for which the stock price was less than or equal to the price of that day.</p>

<ul>
	<li>For example, if the prices of the stock in the last four days is <code>[7,2,1,2]</code> and the price of the stock today is <code>2</code>, then the span of today is <code>4</code> because starting from today, the price of the stock was less than or equal <code>2</code> for <code>4</code> consecutive days.</li>
	<li>Also, if the prices of the stock in the last four days is <code>[7,34,1,2]</code> and the price of the stock today is <code>8</code>, then the span of today is <code>3</code> because starting from today, the price of the stock was less than or equal <code>8</code> for <code>3</code> consecutive days.</li>
</ul>

<p>Implement the <code>StockSpanner</code> class:</p>

<ul>
	<li><code>StockSpanner()</code> Initializes the object of the class.</li>
	<li><code>int next(int price)</code> Returns the <strong>span</strong> of the stock&#39;s price given that today&#39;s price is <code>price</code>.</li>
</ul>

<p>&nbsp;</p>
<p><strong class="example">Example 1:</strong></p>

<pre>
<strong>Input</strong>
[&quot;StockSpanner&quot;, &quot;next&quot;, &quot;next&quot;, &quot;next&quot;, &quot;next&quot;, &quot;next&quot;, &quot;next&quot;, &quot;next&quot;]
[[], [100], [80], [60], [70], [60], [75], [85]]
<strong>Output</strong>
[null, 1, 1, 1, 2, 1, 4, 6]

<strong>Explanation</strong>
StockSpanner stockSpanner = new StockSpanner();
stockSpanner.next(100); // return 1
stockSpanner.next(80);  // return 1
stockSpanner.next(60);  // return 1
stockSpanner.next(70);  // return 2
stockSpanner.next(60);  // return 1
stockSpanner.next(75);  // return 4, because the last 4 prices (including today&#39;s price of 75) were less than or equal to today&#39;s price.
stockSpanner.next(85);  // return 6
</pre>

<p>&nbsp;</p>
<p><strong>Constraints:</strong></p>

<ul>
	<li><code>1 &lt;= price &lt;= 10<sup>5</sup></code></li>
	<li>At most <code>10<sup>4</sup></code> calls will be made to <code>next</code>.</li>
</ul>

['daily-temperatures']
[]
[{"value": "cpp", "text": "C++", "defaultCode": "class StockSpanner {\npublic:\n    StockSpanner() {\n        \n    }\n    \n    int next(int price) {\n        \n    }\n};\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * StockSpanner* obj = new StockSpanner();\n * int param_1 = obj->next(price);\n */"}, {"value": "java", "text": "Java", "defaultCode": "class StockSpanner {\n\n    public StockSpanner() {\n        \n    }\n    \n    public int next(int price) {\n        \n    }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * StockSpanner obj = new StockSpanner();\n * int param_1 = obj.next(price);\n */"}, {"value": "python", "text": "Python", "defaultCode": "class StockSpanner(object):\n\n    def __init__(self):\n        \n\n    def next(self, price):\n        \"\"\"\n        :type price: int\n        :rtype: int\n        \"\"\"\n        \n\n\n# Your StockSpanner object will be instantiated and called as such:\n# obj = StockSpanner()\n# param_1 = obj.next(price)"}, {"value": "python3", "text": "Python3", "defaultCode": "class StockSpanner:\n\n    def __init__(self):\n        \n\n    def next(self, price: int) -> int:\n        \n\n\n# Your StockSpanner object will be instantiated and called as such:\n# obj = StockSpanner()\n# param_1 = obj.next(price)"}, {"value": "c", "text": "C", "defaultCode": "\n\n\ntypedef struct {\n    \n} StockSpanner;\n\n\nStockSpanner* stockSpannerCreate() {\n    \n}\n\nint stockSpannerNext(StockSpanner* obj, int price) {\n    \n}\n\nvoid stockSpannerFree(StockSpanner* obj) {\n    \n}\n\n/**\n * Your StockSpanner struct will be instantiated and called as such:\n * StockSpanner* obj = stockSpannerCreate();\n * int param_1 = stockSpannerNext(obj, price);\n \n * stockSpannerFree(obj);\n*/"}, {"value": "csharp", "text": "C#", "defaultCode": "public class StockSpanner {\n\n    public StockSpanner() {\n        \n    }\n    \n    public int Next(int price) {\n        \n    }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * StockSpanner obj = new StockSpanner();\n * int param_1 = obj.Next(price);\n */"}, {"value": "javascript", "text": "JavaScript", "defaultCode": "\nvar StockSpanner = function() {\n    \n};\n\n/** \n * @param {number} price\n * @return {number}\n */\nStockSpanner.prototype.next = function(price) {\n    \n};\n\n/** \n * Your StockSpanner object will be instantiated and called as such:\n * var obj = new StockSpanner()\n * var param_1 = obj.next(price)\n */"}, {"value": "typescript", "text": "TypeScript", "defaultCode": "class StockSpanner {\n    constructor() {\n        \n    }\n\n    next(price: number): number {\n        \n    }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * var obj = new StockSpanner()\n * var param_1 = obj.next(price)\n */"}, {"value": "php", "text": "PHP", "defaultCode": "class StockSpanner {\n    /**\n     */\n    function __construct() {\n        \n    }\n  \n    /**\n     * @param Integer $price\n     * @return Integer\n     */\n    function next($price) {\n        \n    }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * $obj = StockSpanner();\n * $ret_1 = $obj->next($price);\n */"}, {"value": "swift", "text": "Swift", "defaultCode": "\nclass StockSpanner {\n\n    init() {\n        \n    }\n    \n    func next(_ price: Int) -> Int {\n        \n    }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * let obj = StockSpanner()\n * let ret_1: Int = obj.next(price)\n */"}, {"value": "kotlin", "text": "Kotlin", "defaultCode": "class StockSpanner() {\n\n    fun next(price: Int): Int {\n        \n    }\n\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * var obj = StockSpanner()\n * var param_1 = obj.next(price)\n */"}, {"value": "dart", "text": "Dart", "defaultCode": "class StockSpanner {\n\n  StockSpanner() {\n    \n  }\n  \n  int next(int price) {\n    \n  }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * StockSpanner obj = StockSpanner();\n * int param1 = obj.next(price);\n */"}, {"value": "golang", "text": "Go", "defaultCode": "type StockSpanner struct {\n    \n}\n\n\nfunc Constructor() StockSpanner {\n    \n}\n\n\nfunc (this *StockSpanner) Next(price int) int {\n    \n}\n\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * obj := Constructor();\n * param_1 := obj.Next(price);\n */"}, {"value": "ruby", "text": "Ruby", "defaultCode": "class StockSpanner\n    def initialize()\n        \n    end\n\n\n=begin\n    :type price: Integer\n    :rtype: Integer\n=end\n    def next(price)\n        \n    end\n\n\nend\n\n# Your StockSpanner object will be instantiated and called as such:\n# obj = StockSpanner.new()\n# param_1 = obj.next(price)"}, {"value": "scala", "text": "Scala", "defaultCode": "class StockSpanner() {\n\n    def next(price: Int): Int = {\n        \n    }\n\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * val obj = new StockSpanner()\n * val param_1 = obj.next(price)\n */"}, {"value": "rust", "text": "Rust", "defaultCode": "struct StockSpanner {\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 StockSpanner {\n\n    fn new() -> Self {\n        \n    }\n    \n    fn next(&self, price: i32) -> i32 {\n        \n    }\n}\n\n/**\n * Your StockSpanner object will be instantiated and called as such:\n * let obj = StockSpanner::new();\n * let ret_1: i32 = obj.next(price);\n */"}, {"value": "racket", "text": "Racket", "defaultCode": "(define stock-spanner%\n  (class object%\n    (super-new)\n    \n    (init-field)\n    \n    ; next : exact-integer? -> exact-integer?\n    (define/public (next price)\n      )))\n\n;; Your stock-spanner% object will be instantiated and called as such:\n;; (define obj (new stock-spanner%))\n;; (define param_1 (send obj next price))"}, {"value": "erlang", "text": "Erlang", "defaultCode": "-spec stock_spanner_init_() -> any().\nstock_spanner_init_() ->\n  .\n\n-spec stock_spanner_next(Price :: integer()) -> integer().\nstock_spanner_next(Price) ->\n  .\n\n\n%% Your functions will be called as such:\n%% stock_spanner_init_(),\n%% Param_1 = stock_spanner_next(Price),\n\n%% stock_spanner_init_ will be called before every test case, in which you can do some necessary initializations."}, {"value": "elixir", "text": "Elixir", "defaultCode": "defmodule StockSpanner do\n  @spec init_() :: any\n  def init_() do\n    \n  end\n\n  @spec next(price :: integer) :: integer\n  def next(price) do\n    \n  end\nend\n\n# Your functions will be called as such:\n# StockSpanner.init_()\n# param_1 = StockSpanner.next(price)\n\n# StockSpanner.init_ will be called before every test case, in which you can do some necessary initializations."}]
{
    "classname": "StockSpanner",
    "maxbytesperline": 200000,
    "constructor": {
        "params": []
    },
    "methods": [
        {
            "name" : "next",
            "params": [
                {
                    "type": "integer",
                    "name": "price"
                }
            ],
            "return": {
                "type": "integer"
            }
        }
    ],
    "systemdesign": true,
    "params": [
        {
            "name": "inputs",
            "type": "integer[]"
        },
        {
            "name": "inputs",
            "type": "integer[]"
        }
    ],
    "return": {
        "type": "list<String>",
        "dealloc": true
    }
}
{"cpp": ["C++", "<p>Compiled with <code> clang 19 </code> using the latest C++ 23 standard, and <code>libstdc++</code> provided by GCC 14.</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 21</code>. Using compile arguments: <code>--enable-preview --release 21</code></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 2.7.18</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\">is not maintained anymore</a>. For the latest Python, please choose Python3 instead.</p>"], "c": ["C", "<p>Compiled with <code>gcc 14</code> using the gnu11 standard.</p>\r\n\r\n<p>Your code is compiled with level one 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>\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://learn.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-13\" target=\"_blank\">C# 13</a> with .NET 9 runtime</p>"], "javascript": ["JavaScript", "<p><code>Node.js 22.14.0</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 6.3.2 version of <a href=\"https://github.com/datastructures-js/priority-queue/tree/v6.3.2\" target=\"_blank\">datastructures-js/priority-queue</a> and 4.2.3 version of <a href=\"https://github.com/datastructures-js/queue/tree/v4.2.3\" target=\"_blank\">datastructures-js/queue</a> and 1.0.4 version of <a href=\"https://github.com/datastructures-js/deque/tree/v1.0.4\" target=\"_blank\">datastructures-js/deque</a>.</p>"], "ruby": ["Ruby", "<p><code>Ruby 3.2</code></p>\r\n\r\n<p>Some common data structure implementations are provided in the Algorithms module: https://www.rubydoc.info/github/kanwei/algorithms/Algorithms</p>"], "swift": ["Swift", "<p><code>Swift 6.0</code>.</p>\r\n\r\n<p>You may use the following packages:<br/>\r\n<a href=\"https://github.com/apple/swift-algorithms/tree/1.2.0\" target=\"_blank\">swift-algorithms 1.2.0</a><br/>\r\n<a href=\"https://github.com/apple/swift-collections/tree/1.1.4\" target=\"_blank\">swift-collections 1.1.4</a><br/>\r\n<a href=\"https://github.com/apple/swift-numerics/tree/1.0.2\" target=\"_blank\">swift-numerics 1.0.2</a></p>"], "golang": ["Go", "<p><code>Go 1.23</code></p>\r\n<p>Support <a href=\"https://pkg.go.dev/github.com/emirpasic/gods@v1.18.1\" target=\"_blank\">https://pkg.go.dev/github.com/emirpasic/gods@v1.18.1</a> and <a href=\"https://pkg.go.dev/github.com/emirpasic/gods/v2@v2.0.0-alpha\" target=\"_blank\">https://pkg.go.dev/github.com/emirpasic/gods/v2@v2.0.0-alpha</a> library.</p>"], "python3": ["Python3", "<p><code>Python 3.11</code>.</p>\r\n\r\n<p>Most libraries are already imported automatically for your convenience, such as <a href=\"https://docs.python.org/3/library/array.html\" target=\"_blank\">array</a>, <a href=\"https://docs.python.org/3/library/bisect.html\" target=\"_blank\">bisect</a>, <a href=\"https://docs.python.org/3/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>"], "scala": ["Scala", "<p><code>Scala 3.3.1</code>.</p>"], "kotlin": ["Kotlin", "<p><code>Kotlin 2.1.10</code>.</p>"], "rust": ["Rust", "<p><code>Rust 1.85.0</code>. Your code will be compiled with <code>opt-level</code> 2.</p>\r\n\r\n<p>Supports <a href=\"https://crates.io/crates/rand\" target=\"_blank\">rand v0.8</a> and <a href=\"https://crates.io/crates/regex\" target=\"_blank\">regex\u00a0v1</a> and <a href=\"https://crates.io/crates/itertools\" target=\"_blank\">itertools\u00a0v0.14</a> from crates.io</p>"], "php": ["PHP", "<p><code>PHP 8.2</code>.</p>\r\n<p>With bcmath module</p>"], "typescript": ["Typescript", "<p><code>TypeScript 5.7.3, Node.js 22.14.0</code>.</p>\r\n\r\n<p>Compile Options: <code>--alwaysStrict --strictBindCallApply --strictFunctionTypes --target ES2024</code></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 6.3.2 version of <a href=\"https://github.com/datastructures-js/priority-queue/tree/v6.3.2\" target=\"_blank\">datastructures-js/priority-queue</a> and 4.2.3 version of <a href=\"https://github.com/datastructures-js/queue/tree/v4.2.3\" target=\"_blank\">datastructures-js/queue</a> and 1.0.4 version of <a href=\"https://github.com/datastructures-js/deque/tree/v1.0.4\" target=\"_blank\">datastructures-js/deque</a>.</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>Using <code>#lang racket</code></p>\r\n\r\n<p>Required <code>data/gvector data/queue data/order data/heap</code> automatically for your convenience</p>"], "erlang": ["Erlang", "Erlang/OTP 26"], "elixir": ["Elixir", "Elixir 1.17 with Erlang/OTP 26"], "dart": ["Dart", "<p>Dart 3.2. You may use package <a href=\"https://pub.dev/packages/collection/versions/1.18.0\" target=\"_blank\">collection</a></p>\r\n\r\n<p>Your code will be run directly without compiling</p>"]}
['Stack', 'Design', 'Monotonic Stack', 'Data Stream']