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:[0,1] Given the total number of courses and a li...
LeetCode-Plus One(1) LeetCode - Course Schedule II There are a total of n courses you have to take labelled from 0 to n - 1. Some courses may have prerequisites, for example, if prerequisites[i] = [ai, bi] this means you must take the course bi before the course ai. Given the...
1 <= numCourses <= 2000 0 <= prerequisites.length <= numCourses * (numCourses - 1) prerequisites[i].length == 2 0 <= ai, bi< numCourses ai!= bi 所有[ai, bi]互不相同 题目难度:中等 通过次数:277.7K 提交次数:470.8K 贡献者:LeetCode ...
There may be multiple correct orders, you just need to return one of them. If it is impossible to finish all courses, return an empty array. For example: 2, [[1,0]] There are a total of 2 courses to take. To take course 1 you should have finished course 0. So the correct cours...
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 a list of prerequisitepairs, return the ordering of courses you should take to finish all courses. ...
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 a list of prerequisite pairs, re...
Can you solve this real interview question? Course Schedule IV - There are a total of numCourses courses you have to take, labeled from 0 to numCourses - 1. You are given an array prerequisites where prerequisites[i] = [ai, bi] indicates that you must ta
[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 ...
put(i, new Node(i)); } for(int[] edge: prerequisites) { int to = edge[0]; int from = edge[1]; Node toNode = nodeMap.get(to); toNode.in++; nodeMap.get(from).next.add(toNode); } Queue<Node> zeroQueue = new LinkedList<>(); for(Node n: nodeMap.values()){ if(n.in...
1. Put all nodes and it's next node into a hashmap. e.g 1 -> [2,3] 2. For each node, perform DFS, recursively check if there's a cycle. Create a state array, 0 = not assigned, 1 = checked, -1 = is checking 3. In each DFS, perform: ...