1个回答

blessLR 这个不一定啊，还要把出度为0的也去掉吧，譬如说环上面挂着个出度为0的节点，这个节点由于环的原因入度不为0，但是它也不在环内啊
3 年多之前 回复

C语言数据结构 有向图

c++数据结构有向网相关问题

python networkx 有没有函数可以实现 判断一个无向图中两个结点是否连通

python networkx 有没有函数可以实现 判断一个无向图中两个结点是否连通

1. 输入一个有向图的顶点数 n 和边数 e，设图中顶点编号为 1 到 n， 1）依次输入每个边的起点和终点，创建该图的邻接表； 2）边链表中边结点编号按照从小到大的顺序存储。 2. 实现图的深度优先遍历和广度优先遍历，输入顶点序号 v，给出 1 中有向图 自 v 开始的深度优先遍历序列和广度优先遍历序列

C++语言编程 无向图判断节点存在路径

Problem Description Soda has a complete undirected graph with n vertices. He wants to color the edges with m different colors conveniently labeled from 1 to m. He first selects p edges and colors them. Then he will randomly color the rest edges. He wants to know the total number of different good triangles among all possible graphs. Let i,j,k (i<j<k) be three vertices in the graph. If there's an edge between i and j, an edge between j and k, an edge between k and i. Then we call the tuple (i,j,k) (i<j<k) is a triangle in the graph. Let the colors for edge (i,j), (j,k), (k,j) be x, y and z. If x≠y and x≠z and y≠z, then we call the triangle good. Two triangles are considered different if at least one of the six numbers (i,j,k,x,y,z) is different. Input There are multiple test cases. The first line of input contains an integer T (1≤T≤100), indicating the number of test cases. For each test case: The first line contains three integers n, m and p, (3≤n≤100000,1≤m,p≤200000). Each of the next p lines contains three integer u,v,c (1≤u<v≤n,1≤c≤m) which means the edge (u,v) is colored with color c. Each edge will be given at most once. Most cases are small. Output For each test case, output the total number of good triangles modulo 232. Sample Input 1 4 6 6 1 2 1 1 3 2 1 4 3 2 3 4 2 4 5 3 4 6 Sample Output 4

2020阿里全球数学大赛：3万名高手、4道题、2天2夜未交卷

HashMap底层实现原理，红黑树，B+树，B树的结构原理 Spring的AOP和IOC是什么？它们常见的使用场景有哪些？Spring事务，事务的属性，传播行为，数据库隔离级别 Spring和SpringMVC，MyBatis以及SpringBoot的注解分别有哪些？SpringMVC的工作原理，SpringBoot框架的优点，MyBatis框架的优点 SpringCould组件有哪些，他们...

《经典算法案例》01-08：如何使用质数设计扫雷（Minesweeper）游戏

《Oracle Java SE编程自学与面试指南》最佳学习路线图（2020最新版）