{ "data": { "question": { "questionId": "4151", "questionFrontendId": "3772", "categoryTitle": "Algorithms", "boundTopicId": 3850505, "title": "Maximum Subgraph Score in a Tree", "titleSlug": "maximum-subgraph-score-in-a-tree", "content": "

You are given an undirected tree with n nodes, numbered from 0 to n - 1. It is represented by a 2D integer array edges​​​​​​​ of length n - 1, where edges[i] = [ai, bi] indicates that there is an edge between nodes ai and bi in the tree.

\n\n

You are also given an integer array good of length n, where good[i] is 1 if the ith node is good, and 0 if it is bad.

\n\n

Define the score of a subgraph as the number of good nodes minus the number of bad nodes in that subgraph.

\n\n

For each node i, find the maximum possible score among all connected subgraphs that contain node i.

\n\n

Return an array of n integers where the ith element is the maximum score for node i.

\n\n

A subgraph is a graph whose vertices and edges are subsets of the original graph.

\n\n

A connected subgraph is a subgraph in which every pair of its vertices is reachable from one another using only its edges.

\n\n

 

\n

Example 1:

\n\n

\"Tree

\n\n
\n

Input: n = 3, edges = [[0,1],[1,2]], good = [1,0,1]

\n\n

Output: [1,1,1]

\n\n

Explanation:

\n\n\n
\n\n

Example 2:

\n\n

\"Tree

\n\n
\n

Input: n = 5, edges = [[1,0],[1,2],[1,3],[3,4]], good = [0,1,0,1,1]

\n\n

Output: [2,3,2,3,3]

\n\n

Explanation:

\n\n\n
\n\n

Example 3:

\n\n

\"Tree

\n\n
\n

Input: n = 2, edges = [[0,1]], good = [0,0]

\n\n

Output: [-1,-1]

\n\n

Explanation:

\n\n

For each node, including the other node only adds another bad node, so the best score for both nodes is -1.

\n
\n\n

 

\n

Constraints:

\n\n\n", "translatedTitle": "树中子图的最大得分", "translatedContent": "

给你一个 无向树 ,它包含 n 个节点,编号从 0 到 n - 1。树由一个长度为 n - 1 的二维整数数组 edges 描述,其中 edges[i] = [ai, bi] 表示在节点 ai 和节点 bi 之间有一条边。

\n\n

另给你一个长度为 n 的整数数组 good,其中 good[i] 为 1 表示第 i 个节点是好节点,为 0 表示它是坏节点。

\n\n

定义 子图 的 得分 为子图中好节点的数量减去坏节点的数量。

\n\n

对于每个节点 i,找到包含节点 i 的所有 连通子图 中可能的最大得分。

\n\n

返回一个长度为 n 的整数数组,其中第 i 个元素是节点 i 的 最大得分 

\n\n

子图 是原图的一个子集,其顶点和边均来自原图。

\n\n

连通子图 是一个子图,其中每一对顶点都可以通过该子图的边相互到达。

\n\n

 

\n\n

示例 1:

\n\n

\"Tree

\n\n
\n

输入: n = 3, edges = [[0,1],[1,2]], good = [1,0,1]

\n\n

输出: [1,1,1]

\n\n

解释:

\n\n\n
\n\n

示例 2:

\n\n

\"Tree

\n\n
\n

输入: n = 5, edges = [[1,0],[1,2],[1,3],[3,4]], good = [0,1,0,1,1]

\n\n

输出: [2,3,2,3,3]

\n\n

解释:

\n\n\n
\n\n

示例 3:

\n\n

\"Tree

\n\n
\n

输入: n = 2, edges = [[0,1]], good = [0,0]

\n\n

输出: [-1,-1]

\n\n

解释:

\n\n

对于每个节点,包含另一节点只会增加一个坏节点,因此每个节点的最佳得分为 -1。

\n
\n\n

 

\n\n

提示:

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List[int]\n \"\"\"\n ", "__typename": "CodeSnippetNode" }, { "lang": "JavaScript", "langSlug": "javascript", "code": "/**\n * @param {number} n\n * @param {number[][]} edges\n * @param {number[]} good\n * @return {number[]}\n */\nvar maxSubgraphScore = function(n, edges, good) {\n \n};", "__typename": "CodeSnippetNode" }, { "lang": "TypeScript", "langSlug": "typescript", "code": "function maxSubgraphScore(n: number, edges: number[][], good: number[]): number[] {\n \n};", "__typename": "CodeSnippetNode" }, { "lang": "C#", "langSlug": "csharp", "code": "public class Solution {\n public int[] MaxSubgraphScore(int n, int[][] edges, int[] good) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "C", "langSlug": "c", "code": "/**\n * Note: The returned array must be malloced, assume caller calls free().\n */\nint* maxSubgraphScore(int n, int** edges, int edgesSize, int* edgesColSize, int* good, int goodSize, int* returnSize) {\n \n}", "__typename": "CodeSnippetNode" }, { "lang": "Go", "langSlug": "golang", "code": "func maxSubgraphScore(n int, edges [][]int, good []int) []int {\n \n}", "__typename": "CodeSnippetNode" }, { "lang": "Kotlin", "langSlug": "kotlin", "code": "class Solution {\n fun maxSubgraphScore(n: Int, edges: Array, good: IntArray): IntArray {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Swift", "langSlug": "swift", "code": "class Solution {\n func maxSubgraphScore(_ n: Int, _ edges: [[Int]], _ good: [Int]) -> [Int] {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Rust", "langSlug": "rust", "code": "impl Solution {\n pub fn max_subgraph_score(n: i32, edges: Vec>, good: Vec) -> Vec {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Ruby", "langSlug": "ruby", "code": "# @param {Integer} n\n# @param {Integer[][]} edges\n# @param {Integer[]} good\n# @return {Integer[]}\ndef max_subgraph_score(n, edges, good)\n \nend", "__typename": "CodeSnippetNode" }, { "lang": "PHP", "langSlug": "php", "code": "class Solution {\n\n /**\n * @param Integer $n\n * @param Integer[][] $edges\n * @param Integer[] $good\n * @return Integer[]\n */\n function maxSubgraphScore($n, $edges, $good) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Dart", "langSlug": "dart", "code": "class Solution {\n List maxSubgraphScore(int n, List> edges, List good) {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Scala", "langSlug": "scala", "code": "object Solution {\n def maxSubgraphScore(n: Int, edges: Array[Array[Int]], good: Array[Int]): Array[Int] = {\n \n }\n}", "__typename": "CodeSnippetNode" }, { "lang": "Elixir", "langSlug": "elixir", "code": "defmodule Solution do\n @spec max_subgraph_score(n :: integer, edges :: [[integer]], good :: [integer]) :: [integer]\n def max_subgraph_score(n, edges, good) do\n \n end\nend", "__typename": "CodeSnippetNode" }, { "lang": "Erlang", "langSlug": "erlang", "code": "-spec max_subgraph_score(N :: integer(), Edges :: [[integer()]], Good :: [integer()]) -> 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