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            "questionId": "1752",
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            "title": "Arithmetic Subarrays",
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            "content": "<p>A sequence of numbers is called <strong>arithmetic</strong> if it consists of at least two elements, and the difference between every two consecutive elements is the same. More formally, a sequence <code>s</code> is arithmetic if and only if <code>s[i+1] - s[i] == s[1] - s[0] </code>for all valid <code>i</code>.</p>\n\n<p>For example, these are <strong>arithmetic</strong> sequences:</p>\n\n<pre>\n1, 3, 5, 7, 9\n7, 7, 7, 7\n3, -1, -5, -9</pre>\n\n<p>The following sequence is not <strong>arithmetic</strong>:</p>\n\n<pre>\n1, 1, 2, 5, 7</pre>\n\n<p>You are given an array of <code>n</code> integers, <code>nums</code>, and two arrays of <code>m</code> integers each, <code>l</code> and <code>r</code>, representing the <code>m</code> range queries, where the <code>i<sup>th</sup></code> query is the range <code>[l[i], r[i]]</code>. All the arrays are <strong>0-indexed</strong>.</p>\n\n<p>Return <em>a list of </em><code>boolean</code> <em>elements</em> <code>answer</code><em>, where</em> <code>answer[i]</code> <em>is</em> <code>true</code> <em>if the subarray</em> <code>nums[l[i]], nums[l[i]+1], ... , nums[r[i]]</code><em> can be <strong>rearranged</strong> to form an <strong>arithmetic</strong> sequence, and</em> <code>false</code> <em>otherwise.</em></p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = <code>[4,6,5,9,3,7]</code>, l = <code>[0,0,2]</code>, r = <code>[2,3,5]</code>\n<strong>Output:</strong> <code>[true,false,true]</code>\n<strong>Explanation:</strong>\nIn the 0<sup>th</sup> query, the subarray is [4,6,5]. This can be rearranged as [6,5,4], which is an arithmetic sequence.\nIn the 1<sup>st</sup> query, the subarray is [4,6,5,9]. This cannot be rearranged as an arithmetic sequence.\nIn the 2<sup>nd</sup> query, the subarray is <code>[5,9,3,7]. This</code> can be rearranged as <code>[3,5,7,9]</code>, which is an arithmetic sequence.</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [-12,-9,-3,-12,-6,15,20,-25,-20,-15,-10], l = [0,1,6,4,8,7], r = [4,4,9,7,9,10]\n<strong>Output:</strong> [false,true,false,false,true,true]\n</pre>\n\n<p>&nbsp;</p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>n == nums.length</code></li>\n\t<li><code>m == l.length</code></li>\n\t<li><code>m == r.length</code></li>\n\t<li><code>2 &lt;= n &lt;= 500</code></li>\n\t<li><code>1 &lt;= m &lt;= 500</code></li>\n\t<li><code>0 &lt;= l[i] &lt; r[i] &lt; n</code></li>\n\t<li><code>-10<sup>5</sup> &lt;= nums[i] &lt;= 10<sup>5</sup></code></li>\n</ul>\n",
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            "exampleTestcases": "[4,6,5,9,3,7]\n[0,0,2]\n[2,3,5]\n[-12,-9,-3,-12,-6,15,20,-25,-20,-15,-10]\n[0,1,6,4,8,7]\n[4,4,9,7,9,10]",
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                    "name": "Array",
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                    "name": "Sorting",
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                    "lang": "C++",
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                    "code": "class Solution {\npublic:\n    vector<bool> checkArithmeticSubarrays(vector<int>& nums, vector<int>& l, vector<int>& r) {\n        \n    }\n};",
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                    "code": "class Solution {\n    public List<Boolean> checkArithmeticSubarrays(int[] nums, int[] l, int[] r) {\n        \n    }\n}",
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                    "lang": "Python",
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                    "code": "class Solution(object):\n    def checkArithmeticSubarrays(self, nums, l, r):\n        \"\"\"\n        :type nums: List[int]\n        :type l: List[int]\n        :type r: List[int]\n        :rtype: List[bool]\n        \"\"\"\n        ",
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                    "code": "class Solution:\n    def checkArithmeticSubarrays(self, nums: List[int], l: List[int], r: List[int]) -> List[bool]:\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 */\nbool* checkArithmeticSubarrays(int* nums, int numsSize, int* l, int lSize, int* r, int rSize, int* returnSize){\n\n}",
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                    "code": "public class Solution {\n    public IList<bool> CheckArithmeticSubarrays(int[] nums, int[] l, int[] r) {\n        \n    }\n}",
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                    "code": "/**\n * @param {number[]} nums\n * @param {number[]} l\n * @param {number[]} r\n * @return {boolean[]}\n */\nvar checkArithmeticSubarrays = function(nums, l, r) {\n    \n};",
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                    "code": "# @param {Integer[]} nums\n# @param {Integer[]} l\n# @param {Integer[]} r\n# @return {Boolean[]}\ndef check_arithmetic_subarrays(nums, l, r)\n    \nend",
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                    "code": "class Solution {\n    func checkArithmeticSubarrays(_ nums: [Int], _ l: [Int], _ r: [Int]) -> [Bool] {\n        \n    }\n}",
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                    "lang": "Go",
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                    "code": "func checkArithmeticSubarrays(nums []int, l []int, r []int) []bool {\n    \n}",
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                    "code": "object Solution {\n    def checkArithmeticSubarrays(nums: Array[Int], l: Array[Int], r: Array[Int]): List[Boolean] = {\n        \n    }\n}",
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                    "code": "class Solution {\n    fun checkArithmeticSubarrays(nums: IntArray, l: IntArray, r: IntArray): List<Boolean> {\n        \n    }\n}",
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                    "lang": "Rust",
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                    "code": "impl Solution {\n    pub fn check_arithmetic_subarrays(nums: Vec<i32>, l: Vec<i32>, r: Vec<i32>) -> Vec<bool> {\n        \n    }\n}",
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                    "lang": "PHP",
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                    "code": "class Solution {\n\n    /**\n     * @param Integer[] $nums\n     * @param Integer[] $l\n     * @param Integer[] $r\n     * @return Boolean[]\n     */\n    function checkArithmeticSubarrays($nums, $l, $r) {\n        \n    }\n}",
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                    "lang": "TypeScript",
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                    "code": "function checkArithmeticSubarrays(nums: number[], l: number[], r: number[]): boolean[] {\n\n};",
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                    "code": "(define/contract (check-arithmetic-subarrays nums l r)\n  (-> (listof exact-integer?) (listof exact-integer?) (listof exact-integer?) (listof boolean?))\n\n  )",
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                    "lang": "Erlang",
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                    "code": "-spec check_arithmetic_subarrays(Nums :: [integer()], L :: [integer()], R :: [integer()]) -> [boolean()].\ncheck_arithmetic_subarrays(Nums, L, R) ->\n  .",
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                    "lang": "Elixir",
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                    "code": "defmodule Solution do\n  @spec check_arithmetic_subarrays(nums :: [integer], l :: [integer], r :: [integer]) :: [boolean]\n  def check_arithmetic_subarrays(nums, l, r) do\n\n  end\nend",
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            "hints": [
                "To check if a given sequence is arithmetic, just check that the difference between every two consecutive elements is the same.",
                "If and only if a set of numbers can make an arithmetic sequence, then its sorted version makes an arithmetic sequence. So to check a set of numbers, sort it, and check if that sequence is arithmetic.",
                "For each query, get the corresponding set of numbers which will be the sub-array represented by the query, sort it, and check if the result sequence is arithmetic."
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            "solution": null,
            "status": null,
            "sampleTestCase": "[4,6,5,9,3,7]\n[0,0,2]\n[2,3,5]",
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