leetcode-problemset/leetcode/originData/find-all-good-indices.json

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            "title": "Find All Good Indices",
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            "content": "<p>You are given a <strong>0-indexed</strong> integer array <code>nums</code> of size <code>n</code> and a positive integer <code>k</code>.</p>\n\n<p>We call an index <code>i</code> in the range <code>k &lt;= i &lt; n - k</code> <strong>good</strong> if the following conditions are satisfied:</p>\n\n<ul>\n\t<li>The <code>k</code> elements that are just <strong>before</strong> the index <code>i</code> are in <strong>non-increasing</strong> order.</li>\n\t<li>The <code>k</code> elements that are just <strong>after</strong> the index <code>i</code> are in <strong>non-decreasing</strong> order.</li>\n</ul>\n\n<p>Return <em>an array of all good indices sorted in <strong>increasing</strong> order</em>.</p>\n\n<p>&nbsp;</p>\n<p><strong>Example 1:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2,1,1,1,3,4,1], k = 2\n<strong>Output:</strong> [2,3]\n<strong>Explanation:</strong> There are two good indices in the array:\n- Index 2. The subarray [2,1] is in non-increasing order, and the subarray [1,3] is in non-decreasing order.\n- Index 3. The subarray [1,1] is in non-increasing order, and the subarray [3,4] is in non-decreasing order.\nNote that the index 4 is not good because [4,1] is not non-decreasing.</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> nums = [2,1,1,2], k = 2\n<strong>Output:</strong> []\n<strong>Explanation:</strong> There are no good indices in this array.\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>3 &lt;= n &lt;= 10<sup>5</sup></code></li>\n\t<li><code>1 &lt;= nums[i] &lt;= 10<sup>6</sup></code></li>\n\t<li><code>1 &lt;= k &lt;= n / 2</code></li>\n</ul>\n",
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                {
                    "lang": "C++",
                    "langSlug": "cpp",
                    "code": "class Solution {\npublic:\n    vector<int> goodIndices(vector<int>& nums, int k) {\n        \n    }\n};",
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                    "code": "class Solution {\n    public List<Integer> goodIndices(int[] nums, int k) {\n        \n    }\n}",
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                {
                    "lang": "Python",
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                    "code": "class Solution(object):\n    def goodIndices(self, nums, k):\n        \"\"\"\n        :type nums: List[int]\n        :type k: int\n        :rtype: List[int]\n        \"\"\"\n        ",
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                    "code": "class Solution:\n    def goodIndices(self, nums: List[int], k: 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* goodIndices(int* nums, int numsSize, int k, int* returnSize){\n\n}",
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                    "lang": "C#",
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                    "code": "public class Solution {\n    public IList<int> GoodIndices(int[] nums, int k) {\n        \n    }\n}",
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                    "lang": "JavaScript",
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                    "code": "/**\n * @param {number[]} nums\n * @param {number} k\n * @return {number[]}\n */\nvar goodIndices = function(nums, k) {\n    \n};",
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                    "lang": "Ruby",
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                    "code": "# @param {Integer[]} nums\n# @param {Integer} k\n# @return {Integer[]}\ndef good_indices(nums, k)\n    \nend",
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                    "lang": "Swift",
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                    "code": "class Solution {\n    func goodIndices(_ nums: [Int], _ k: Int) -> [Int] {\n        \n    }\n}",
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                    "lang": "Go",
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                    "code": "func goodIndices(nums []int, k int) []int {\n    \n}",
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                    "lang": "Scala",
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                    "code": "object Solution {\n    def goodIndices(nums: Array[Int], k: Int): List[Int] = {\n        \n    }\n}",
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                    "lang": "Kotlin",
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                    "code": "class Solution {\n    fun goodIndices(nums: IntArray, k: Int): List<Int> {\n        \n    }\n}",
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                    "lang": "Rust",
                    "langSlug": "rust",
                    "code": "impl Solution {\n    pub fn good_indices(nums: Vec<i32>, k: i32) -> Vec<i32> {\n        \n    }\n}",
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                    "lang": "PHP",
                    "langSlug": "php",
                    "code": "class Solution {\n\n    /**\n     * @param Integer[] $nums\n     * @param Integer $k\n     * @return Integer[]\n     */\n    function goodIndices($nums, $k) {\n        \n    }\n}",
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                    "lang": "TypeScript",
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                    "code": "function goodIndices(nums: number[], k: number): number[] {\n\n};",
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                    "code": "(define/contract (good-indices nums k)\n  (-> (listof exact-integer?) exact-integer? (listof exact-integer?))\n\n  )",
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                    "lang": "Erlang",
                    "langSlug": "erlang",
                    "code": "-spec good_indices(Nums :: [integer()], K :: integer()) -> [integer()].\ngood_indices(Nums, K) ->\n  .",
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                    "lang": "Elixir",
                    "langSlug": "elixir",
                    "code": "defmodule Solution do\n  @spec good_indices(nums :: [integer], k :: integer) :: [integer]\n  def good_indices(nums, k) do\n\n  end\nend",
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                    "lang": "Dart",
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                    "code": "class Solution {\n  List<int> goodIndices(List<int> nums, int k) {\n\n  }\n}",
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            "hints": [
                "Iterate over all indices i. How do you quickly check the two conditions?",
                "Precompute for each index whether the conditions are satisfied on the left and the right of the index. You can do that with two iterations, from left to right and right to left."
            ],
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            "sampleTestCase": "[2,1,1,1,3,4,1]\n2",
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