Sheng ChenLi LiangYunbo TianLinear Algebra and its ApplicationsS. Chen, L. Liang, Y. Tian. The number of connected components in a graph associated with a rectangular (0,1)-matrix. Linear Algebra & Its Applications. 487 (2015) 74-85....
In graph theory, a connected component (or justcomponent) of an undirected graph is a subgraph in which any two vertices are connected to each other by paths, and which is connected to no additional vertices in the supergraph. Connected Components即连通域,适用于无向图。一个连通域,指的是这...
You have a graph ofnnodes. You are given an integernand an arrayedgeswhereedges[i] = [ai, bi]indicates that there is an edge betweenaiandbiin the graph. Returnthe number of connected components in the graph. Example 1: Input: n = 5, edges = [[0,1],[1,2],[3,4]] Output: 2...
题目地址:https://leetcode-cn.com/problems/number-of-connected-components-in-an-undirected-graph/ 题目描述 Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to find...
1 public class Solution { 2 private int[] parent; 3 public int countComponents(int n, int[][] edges) { 4 if (edges.length == 0) { 5 return n; 6 } 7 ..
Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of nodes), write a function to find the number of connected components in an undirected graph. Example 1: 0 3 | | 1 --- 2 4 Given n = 5 and edges = [[0, 1], [1, 2], [3, ...
1 对于union find,如果两个在一个set里,就返回0,如果不在一个set里,就将他们俩union,同时返回1 2 count初始化成n,因为初始时是n个set 3 遍历edges里面的所有edge上的两个node,如果此两个node是连接的,count不变化;如果不是连接的,则union返回1,count减1,同时union这两个node...
Ingraph theory, aconnected componentof anundirected graphis asubgraphin which any two vertices areconnectedto each other bypaths, and which is connected to no additional vertices. For example, the graph shown in the illustration on the right has three connected components. A graph that is itself...
Givennnodes labeled from0ton - 1and a list of undirected edges (each edge is a pair of nodes), write a function to find the number of connected components in an undirected graph. Example 1: 03 | |1---24 Givenn = 5and edges =[[0, 1], [1, 2], [3, 4]], return2. ...
323. Number of Connected Components in an Undirected Graph 题目链接:https://leetcode.com/problems... 这道题和numbers of islands II 是一个思路,一个count初始化为n,union find每次有新的edge就union两个节点,如果两个节点(u, v)原来不在一个连通图里面就减少count并且连起来,如果原来就在一个图里面就...