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            "questionId": "2165",
            "questionFrontendId": "2055",
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            "title": "Plates Between Candles",
            "titleSlug": "plates-between-candles",
            "content": "<p>There is a long table with a line of plates and candles arranged on top of it. You are given a <strong>0-indexed</strong> string <code>s</code> consisting of characters <code>&#39;*&#39;</code> and <code>&#39;|&#39;</code> only, where a <code>&#39;*&#39;</code> represents a <strong>plate</strong> and a <code>&#39;|&#39;</code> represents a <strong>candle</strong>.</p>\n\n<p>You are also given a <strong>0-indexed</strong> 2D integer array <code>queries</code> where <code>queries[i] = [left<sub>i</sub>, right<sub>i</sub>]</code> denotes the <strong>substring</strong> <code>s[left<sub>i</sub>...right<sub>i</sub>]</code> (<strong>inclusive</strong>). For each query, you need to find the <strong>number</strong> of plates <strong>between candles</strong> that are <strong>in the substring</strong>. A plate is considered <strong>between candles</strong> if there is at least one candle to its left <strong>and</strong> at least one candle to its right <strong>in the substring</strong>.</p>\n\n<ul>\n\t<li>For example, <code>s = &quot;||**||**|*&quot;</code>, and a query <code>[3, 8]</code> denotes the substring <code>&quot;*||<strong><u>**</u></strong>|&quot;</code>. The number of plates between candles in this substring is <code>2</code>, as each of the two plates has at least one candle <strong>in the substring</strong> to its left <strong>and</strong> right.</li>\n</ul>\n\n<p>Return <em>an integer array</em> <code>answer</code> <em>where</em> <code>answer[i]</code> <em>is the answer to the</em> <code>i<sup>th</sup></code> <em>query</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n<img alt=\"ex-1\" src=\"https://assets.leetcode.com/uploads/2021/10/04/ex-1.png\" style=\"width: 400px; height: 134px;\" />\n<pre>\n<strong>Input:</strong> s = &quot;**|**|***|&quot;, queries = [[2,5],[5,9]]\n<strong>Output:</strong> [2,3]\n<strong>Explanation:</strong>\n- queries[0] has two plates between candles.\n- queries[1] has three plates between candles.\n</pre>\n\n<p><strong>Example 2:</strong></p>\n<img alt=\"ex-2\" src=\"https://assets.leetcode.com/uploads/2021/10/04/ex-2.png\" style=\"width: 600px; height: 193px;\" />\n<pre>\n<strong>Input:</strong> s = &quot;***|**|*****|**||**|*&quot;, queries = [[1,17],[4,5],[14,17],[5,11],[15,16]]\n<strong>Output:</strong> [9,0,0,0,0]\n<strong>Explanation:</strong>\n- queries[0] has nine plates between candles.\n- The other queries have zero plates between candles.\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>3 &lt;= s.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>s</code> consists of <code>&#39;*&#39;</code> and <code>&#39;|&#39;</code> characters.</li>\n\t<li><code>1 &lt;= queries.length &lt;= 10<sup>5</sup></code></li>\n\t<li><code>queries[i].length == 2</code></li>\n\t<li><code>0 &lt;= left<sub>i</sub> &lt;= right<sub>i</sub> &lt; s.length</code></li>\n</ul>\n",
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            "exampleTestcases": "\"**|**|***|\"\n[[2,5],[5,9]]\n\"***|**|*****|**||**|*\"\n[[1,17],[4,5],[14,17],[5,11],[15,16]]",
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                    "name": "Binary Search",
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                    "lang": "C++",
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                    "code": "class Solution {\npublic:\n    vector<int> platesBetweenCandles(string s, vector<vector<int>>& queries) {\n        \n    }\n};",
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                    "lang": "Java",
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                    "code": "class Solution {\n    public int[] platesBetweenCandles(String s, int[][] queries) {\n        \n    }\n}",
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                    "lang": "Python",
                    "langSlug": "python",
                    "code": "class Solution(object):\n    def platesBetweenCandles(self, s, queries):\n        \"\"\"\n        :type s: str\n        :type queries: List[List[int]]\n        :rtype: List[int]\n        \"\"\"\n        ",
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                    "lang": "Python3",
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                    "code": "class Solution:\n    def platesBetweenCandles(self, s: str, queries: List[List[int]]) -> List[int]:\n        ",
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                    "lang": "C",
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                    "code": "\n\n/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* platesBetweenCandles(char * s, int** queries, int queriesSize, int* queriesColSize, int* returnSize){\n\n}",
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                    "lang": "C#",
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                    "code": "public class Solution {\n    public int[] PlatesBetweenCandles(string s, int[][] queries) {\n        \n    }\n}",
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                    "lang": "JavaScript",
                    "langSlug": "javascript",
                    "code": "/**\n * @param {string} s\n * @param {number[][]} queries\n * @return {number[]}\n */\nvar platesBetweenCandles = function(s, queries) {\n    \n};",
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                    "lang": "Ruby",
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                    "code": "# @param {String} s\n# @param {Integer[][]} queries\n# @return {Integer[]}\ndef plates_between_candles(s, queries)\n    \nend",
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                    "lang": "Swift",
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                    "code": "class Solution {\n    func platesBetweenCandles(_ s: String, _ queries: [[Int]]) -> [Int] {\n        \n    }\n}",
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                    "lang": "Go",
                    "langSlug": "golang",
                    "code": "func platesBetweenCandles(s string, queries [][]int) []int {\n    \n}",
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                    "lang": "Scala",
                    "langSlug": "scala",
                    "code": "object Solution {\n    def platesBetweenCandles(s: String, queries: Array[Array[Int]]): Array[Int] = {\n        \n    }\n}",
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                    "lang": "Kotlin",
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                    "code": "class Solution {\n    fun platesBetweenCandles(s: String, queries: Array<IntArray>): IntArray {\n        \n    }\n}",
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                    "lang": "Rust",
                    "langSlug": "rust",
                    "code": "impl Solution {\n    pub fn plates_between_candles(s: String, queries: Vec<Vec<i32>>) -> Vec<i32> {\n        \n    }\n}",
                    "__typename": "CodeSnippetNode"
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                    "lang": "PHP",
                    "langSlug": "php",
                    "code": "class Solution {\n\n    /**\n     * @param String $s\n     * @param Integer[][] $queries\n     * @return Integer[]\n     */\n    function platesBetweenCandles($s, $queries) {\n        \n    }\n}",
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                    "lang": "TypeScript",
                    "langSlug": "typescript",
                    "code": "function platesBetweenCandles(s: string, queries: number[][]): number[] {\n\n};",
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                    "lang": "Racket",
                    "langSlug": "racket",
                    "code": "(define/contract (plates-between-candles s queries)\n  (-> string? (listof (listof exact-integer?)) (listof exact-integer?))\n\n  )",
                    "__typename": "CodeSnippetNode"
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                    "lang": "Erlang",
                    "langSlug": "erlang",
                    "code": "-spec plates_between_candles(S :: unicode:unicode_binary(), Queries :: [[integer()]]) -> [integer()].\nplates_between_candles(S, Queries) ->\n  .",
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                    "lang": "Elixir",
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                    "code": "defmodule Solution do\n  @spec plates_between_candles(s :: String.t, queries :: [[integer]]) :: [integer]\n  def plates_between_candles(s, queries) do\n\n  end\nend",
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            "hints": [
                "Can you find the indices of the most left and right candles for a given substring, perhaps by using binary search (or better) over an array of indices of all the bars?",
                "Once the indices of the most left and right bars are determined, how can you efficiently count the number of plates within the range? Prefix sums?"
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            "solution": null,
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