{ "data": { "question": { "questionId": "3863", "questionFrontendId": "3607", "categoryTitle": "Algorithms", "boundTopicId": 3714205, "title": "Power Grid Maintenance", "titleSlug": "power-grid-maintenance", "content": "

You are given an integer c representing c power stations, each with a unique identifier id from 1 to c (1‑based indexing).

\n\n

These stations are interconnected via n bidirectional cables, represented by a 2D array connections, where each element connections[i] = [ui, vi] indicates a connection between station ui and station vi. Stations that are directly or indirectly connected form a power grid.

\n\n

Initially, all stations are online (operational).

\n\n

You are also given a 2D array queries, where each query is one of the following two types:

\n\n\n\n

Return an array of integers representing the results of each query of type [1, x] in the order they appear.

\n\n

Note: The power grid preserves its structure; an offline (non‑operational) node remains part of its grid and taking it offline does not alter connectivity.

\n\n

 

\n

Example 1:

\n\n
\n

Input: c = 5, connections = [[1,2],[2,3],[3,4],[4,5]], queries = [[1,3],[2,1],[1,1],[2,2],[1,2]]

\n\n

Output: [3,2,3]

\n\n

Explanation:

\n\n

\"\"

\n\n\n
\n\n

Example 2:

\n\n
\n

Input: c = 3, connections = [], queries = [[1,1],[2,1],[1,1]]

\n\n

Output: [1,-1]

\n\n

Explanation:

\n\n\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "电网维护", "translatedContent": "

给你一个整数 c，表示 c 个电站，每个电站有一个唯一标识符 id，从 1 到 c 编号。

\n\n

这些电站通过 n 条 双向 电缆互相连接，表示为一个二维数组 connections，其中每个元素 connections[i] = [ui, vi] 表示电站 ui 和电站 vi 之间的连接。直接或间接连接的电站组成了一个 电网 。

\n\n

最初，所有 电站均处于在线（正常运行）状态。

\n\n

另给你一个二维数组 queries，其中每个查询属于以下 两种类型之一 ：

\n\n\n\n

返回一个整数数组，表示按照查询中出现的顺序，所有类型为 [1, x] 的查询结果。

\n\n

注意：电网的结构是固定的；离线（非运行）的节点仍然属于其所在的电网，且离线操作不会改变电网的连接性。

\n\n

 

\n\n

示例 1：

\n\n
\n

输入： c = 5, connections = [[1,2],[2,3],[3,4],[4,5]], queries = [[1,3],[2,1],[1,1],[2,2],[1,2]]

\n\n

输出： [3,2,3]

\n\n

解释：

\n\n

\"\"

\n\n\n
\n\n

示例 2：

\n\n
\n

输入： c = 3, connections = [], queries = [[1,1],[2,1],[1,1]]

\n\n

输出： [1,-1]

\n\n

解释：

\n\n\n
\n\n

 

\n\n

提示：

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{\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Python", "langSlug": "python", "code": "class Solution(object):\n def processQueries(self, c, connections, queries):\n \"\"\"\n :type c: int\n :type connections: List[List[int]]\n :type queries: List[List[int]]\n :rtype: List[int]\n \"\"\"\n ", "__typename": "CodeSnippetNode" }, { "lang": "Python3", "langSlug": "python3", "code": "class Solution:\n def processQueries(self, c: int, connections: List[List[int]], queries: List[List[int]]) -> List[int]:\n ", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* processQueries(int c, int** connections, int connectionsSize, int* connectionsColSize, int** queries, int queriesSize, int* queriesColSize, int* returnSize) {\n \n}", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class Solution {\n public int[] ProcessQueries(int c, int[][] connections, int[][] queries) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * @param {number} c\n * @param {number[][]} connections\n * @param {number[][]} queries\n * @return {number[]}\n */\nvar processQueries = function(c, connections, queries) {\n \n};", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "function processQueries(c: number, connections: number[][], queries: number[][]): number[] {\n \n};", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class Solution {\n\n /**\n * @param Integer $c\n * @param Integer[][] $connections\n * @param Integer[][] $queries\n * @return Integer[]\n */\n function processQueries($c, $connections, $queries) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "class Solution {\n func processQueries(_ c: Int, _ connections: [[Int]], _ queries: [[Int]]) -> [Int] {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class Solution {\n fun processQueries(c: Int, connections: Array, queries: Array): IntArray {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Dart", "langSlug": "dart", "code": "class Solution {\n List processQueries(int c, List> connections, List> queries) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "func processQueries(c int, connections [][]int, queries [][]int) []int {\n \n}", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "# @param {Integer} c\n# @param {Integer[][]} connections\n# @param {Integer[][]} queries\n# @return {Integer[]}\ndef process_queries(c, connections, queries)\n \nend", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "object Solution {\n def processQueries(c: Int, connections: Array[Array[Int]], queries: Array[Array[Int]]): Array[Int] = {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "impl Solution {\n pub fn process_queries(c: i32, connections: Vec>, queries: Vec>) -> Vec {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Racket", "langSlug": "racket", "code": "(define/contract (process-queries c connections queries)\n (-> exact-integer? 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\\u60a8\\u7684\\u4ee3\\u7801\\u5c06\\u4f1a\\u88ab\\u4e0d\\u7f16\\u8bd1\\u76f4\\u63a5\\u8fd0\\u884c<\\/p>\"],\"cangjie\":[\"Cangjie\",\"
\\u7248\\u672c\\uff1a0.53.11 (cjnative)<\\/p>\\r\\n\\r\\n
\\u7f16\\u8bd1\\u53c2\\u6570\\uff1a-O2 --disable-reflection<\\/code><\\/p>\\r\\n\\r\\n
\\u5feb\\u901f\\u5165\\u95e8\\u8bf7\\u67e5\\u9605\\u300c\\u4ed3\\u9889\\u7f16\\u7a0b\\u8bed\\u8a00\\u5f00\\u53d1\\u6307\\u5357\\u300d<\\/a><\\/p>\"]}",
            "book": null,
            "isSubscribed": false,
            "isDailyQuestion": false,
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            "editorType": "CKEDITOR",
            "ugcQuestionId": null,
            "style": "LEETCODE",
            "exampleTestcases": "5\n[[1,2],[2,3],[3,4],[4,5]]\n[[1,3],[2,1],[1,1],[2,2],[1,2]]\n3\n[]\n[[1,1],[2,1],[1,1]]",
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}