210. Course Schedule II # 题目# There are a total of n courses you have to take, labeled from 0 to n-1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: [0,1] Given the total number of courses and...
leetcode@ [207] Course Schedule 1 struct edge{ 2 int to,cost; 3 edge(){ this->to = 0; this->cost = 0;} 4 edge(int t){ this->to = t; this->cost = 0;} 5 }; 6 class Solution { 7 public: 8 void addEdge(vector<edge> &edgelist, vector<vector<int>> &G, int from, ...
对所有节点都进行判断1 检查,即可知道图中是否存在环。 View Code 210. Course Schedule II There are a total ofncourses you have to take, labeled from0ton - 1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair:...
如果可以,返回true;否则,返回false。 示例1: 输入:numCourses = 2, prerequisites = [[1,0]]输出:true解释:总共有 2 门课程。学习课程 1 之前,你需要完成课程 0 。这是可能的。 示例2: 输入:numCourses = 2, prerequisites = [[1,0],[0,1]]输出:false解释:总共有 2 门课程。学习课程 1 之前,你...
题目地址:https://leetcode.com/problems/course-schedule/description/ 题目描述: There are a total of n courses you have to take, labeled from0ton-1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair:[0,1] ...
[LeetCode]CourseSchedule 书影博客 题目描述: There are a total of n courses you have to take, labeled from 0 to n - 1. Some courses may have prerequisites, for example to take course 0 you have to first take course 1, which is expressed as a pair: [0,1] Given the total number ...
建议和leetcode 210. Course Schedule II 拓扑排序 + HashSet和leetcode 630. Course Schedule III 课程调度 + 贪心算法 一起学习 需要注意的是,由于这道题更新了测试用例所以原先的代码可能出现问题,情况是这样的,记录后继结点要使用vector,不要使用set,因为假如存在(1,9)和(1,9)多次出现,这样就会出现问题,所...
例如,先修课程对[0, 1]表示:想要学习课程0,你需要先完成课程1。 请你判断是否可能完成所有课程的学习?如果可以,返回true;否则,返回false。 示例1: 输入:numCourses = 2, prerequisites = [[1,0]]输出:true解释:总共有 2 门课程。学习课程 1 之前,你需要完成课程 0 。这是可能的。
例如,想要学习课程0,你需要先完成课程1,我们用一个匹配来表示:[0,1]。 返回你为了学完所有课程所安排的学习顺序。可能会有多个正确的顺序,你只要返回任意一种就可以了。如果不可能完成所有课程,返回一个空数组。 示例1: 输入:numCourses = 2, prerequisites = [[1,0]]输出:[0,1]解释:总共有 2 门课程。
现在你总共有numCourses门课需要选,记为0到numCourses - 1。给你一个数组prerequisites,其中prerequisites[i] = [ai, bi],表示在选修课程ai前必须先选修bi。 例如,想要学习课程0,你需要先完成课程1,我们用一个匹配来表示:[0,1]。 返回你为了学完所有课程所安排的学习顺序。可能会有多个正确的顺序,你只要返回...