mirror of
https://gitee.com/coder-xiaomo/leetcode-problemset
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181 lines
18 KiB
JSON
181 lines
18 KiB
JSON
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"question": {
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"questionId": "1309",
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"questionFrontendId": "1203",
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"boundTopicId": null,
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"title": "Sort Items by Groups Respecting Dependencies",
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"titleSlug": "sort-items-by-groups-respecting-dependencies",
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"content": "<p>There are <code>n</code> items each belonging to zero or one of <code>m</code> groups where <code>group[i]</code> is the group that the <code>i</code>-th item belongs to and it's equal to <code>-1</code> if the <code>i</code>-th item belongs to no group. The items and the groups are zero indexed. A group can have no item belonging to it.</p>\n\n<p>Return a sorted list of the items such that:</p>\n\n<ul>\n\t<li>The items that belong to the same group are next to each other in the sorted list.</li>\n\t<li>There are some relations between these items where <code>beforeItems[i]</code> is a list containing all the items that should come before the <code>i</code>-th item in the sorted array (to the left of the <code>i</code>-th item).</li>\n</ul>\n\n<p>Return any solution if there is more than one solution and return an <strong>empty list</strong> if there is no solution.</p>\n\n<p> </p>\n<p><strong>Example 1:</strong></p>\n\n<p><strong><img alt=\"\" src=\"https://assets.leetcode.com/uploads/2019/09/11/1359_ex1.png\" style=\"width: 191px; height: 181px;\" /></strong></p>\n\n<pre>\n<strong>Input:</strong> n = 8, m = 2, group = [-1,-1,1,0,0,1,0,-1], beforeItems = [[],[6],[5],[6],[3,6],[],[],[]]\n<strong>Output:</strong> [6,3,4,1,5,2,0,7]\n</pre>\n\n<p><strong>Example 2:</strong></p>\n\n<pre>\n<strong>Input:</strong> n = 8, m = 2, group = [-1,-1,1,0,0,1,0,-1], beforeItems = [[],[6],[5],[6],[3],[],[4],[]]\n<strong>Output:</strong> []\n<strong>Explanation:</strong> This is the same as example 1 except that 4 needs to be before 6 in the sorted list.\n</pre>\n\n<p> </p>\n<p><strong>Constraints:</strong></p>\n\n<ul>\n\t<li><code>1 <= m <= n <= 3 * 10<sup>4</sup></code></li>\n\t<li><code>group.length == beforeItems.length == n</code></li>\n\t<li><code>-1 <= group[i] <= m - 1</code></li>\n\t<li><code>0 <= beforeItems[i].length <= n - 1</code></li>\n\t<li><code>0 <= beforeItems[i][j] <= n - 1</code></li>\n\t<li><code>i != beforeItems[i][j]</code></li>\n\t<li><code>beforeItems[i] </code>does not contain duplicates elements.</li>\n</ul>\n",
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"translatedTitle": null,
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"isPaidOnly": false,
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"difficulty": "Hard",
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"likes": 583,
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"exampleTestcases": "8\n2\n[-1,-1,1,0,0,1,0,-1]\n[[],[6],[5],[6],[3,6],[],[],[]]\n8\n2\n[-1,-1,1,0,0,1,0,-1]\n[[],[6],[5],[6],[3],[],[4],[]]",
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"categoryTitle": "Algorithms",
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"name": "Depth-First Search",
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"name": "Breadth-First Search",
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"name": "Topological Sort",
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"lang": "C++",
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"code": "class Solution {\npublic:\n vector<int> sortItems(int n, int m, vector<int>& group, vector<vector<int>>& beforeItems) {\n \n }\n};",
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"lang": "Java",
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"code": "class Solution {\n public int[] sortItems(int n, int m, int[] group, List<List<Integer>> beforeItems) {\n \n }\n}",
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"lang": "Python",
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"code": "class Solution(object):\n def sortItems(self, n, m, group, beforeItems):\n \"\"\"\n :type n: int\n :type m: int\n :type group: List[int]\n :type beforeItems: List[List[int]]\n :rtype: List[int]\n \"\"\"\n ",
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"code": "class Solution:\n def sortItems(self, n: int, m: int, group: List[int], beforeItems: 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* sortItems(int n, int m, int* group, int groupSize, int** beforeItems, int beforeItemsSize, int* beforeItemsColSize, int* returnSize){\n\n}",
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"lang": "C#",
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"langSlug": "csharp",
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"code": "public class Solution {\n public int[] SortItems(int n, int m, int[] group, IList<IList<int>> beforeItems) {\n \n }\n}",
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"lang": "JavaScript",
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"code": "/**\n * @param {number} n\n * @param {number} m\n * @param {number[]} group\n * @param {number[][]} beforeItems\n * @return {number[]}\n */\nvar sortItems = function(n, m, group, beforeItems) {\n \n};",
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"lang": "Ruby",
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"code": "# @param {Integer} n\n# @param {Integer} m\n# @param {Integer[]} group\n# @param {Integer[][]} before_items\n# @return {Integer[]}\ndef sort_items(n, m, group, before_items)\n \nend",
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"lang": "Swift",
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"langSlug": "swift",
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"code": "class Solution {\n func sortItems(_ n: Int, _ m: Int, _ group: [Int], _ beforeItems: [[Int]]) -> [Int] {\n \n }\n}",
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"lang": "Go",
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"langSlug": "golang",
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"code": "func sortItems(n int, m int, group []int, beforeItems [][]int) []int {\n \n}",
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"lang": "Scala",
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"langSlug": "scala",
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"code": "object Solution {\n def sortItems(n: Int, m: Int, group: Array[Int], beforeItems: List[List[Int]]): Array[Int] = {\n \n }\n}",
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"lang": "Kotlin",
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"langSlug": "kotlin",
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"code": "class Solution {\n fun sortItems(n: Int, m: Int, group: IntArray, beforeItems: List<List<Int>>): IntArray {\n \n }\n}",
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"__typename": "CodeSnippetNode"
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"lang": "Rust",
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"langSlug": "rust",
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"code": "impl Solution {\n pub fn sort_items(n: i32, m: i32, group: Vec<i32>, before_items: Vec<Vec<i32>>) -> Vec<i32> {\n \n }\n}",
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"__typename": "CodeSnippetNode"
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"lang": "PHP",
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"langSlug": "php",
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"code": "class Solution {\n\n /**\n * @param Integer $n\n * @param Integer $m\n * @param Integer[] $group\n * @param Integer[][] $beforeItems\n * @return Integer[]\n */\n function sortItems($n, $m, $group, $beforeItems) {\n \n }\n}",
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"lang": "TypeScript",
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"code": "function sortItems(n: number, m: number, group: number[], beforeItems: number[][]): number[] {\n\n};",
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"lang": "Racket",
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"code": "(define/contract (sort-items n m group beforeItems)\n (-> exact-integer? exact-integer? (listof exact-integer?) (listof (listof exact-integer?)) (listof exact-integer?))\n\n )",
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"lang": "Erlang",
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"langSlug": "erlang",
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"code": "-spec sort_items(N :: integer(), M :: integer(), Group :: [integer()], BeforeItems :: [[integer()]]) -> [integer()].\nsort_items(N, M, Group, BeforeItems) ->\n .",
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"lang": "Elixir",
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"langSlug": "elixir",
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"code": "defmodule Solution do\n @spec sort_items(n :: integer, m :: integer, group :: [integer], before_items :: [[integer]]) :: [integer]\n def sort_items(n, m, group, before_items) do\n\n end\nend",
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"hints": [
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"Think of it as a graph problem.",
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"We need to find a topological order on the dependency graph.",
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"Build two graphs, one for the groups and another for the items."
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],
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"solution": null,
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"sampleTestCase": "8\n2\n[-1,-1,1,0,0,1,0,-1]\n[[],[6],[5],[6],[3,6],[],[],[]]",
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"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>. 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