输入:numCourses = 4, prerequisites = [[1,0],[2,0],[3,1],[3,2]]输出:[0,2,1,3]解释:总共有 4 门课程。要学习课程 3,你应该先完成课程 1 和课程 2。并且课程 1 和课程 2 都应该排在课程 0 之后。 因此,一个正确的课程顺序是[0,1,2,3]。另一个正确的排序是[0,2,1,3]。
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 total number of courses...
Well, this problem is spiritually similar to toCourse Schedule. You only need to store the nodes in the order you visit into a vector during BFS or DFS. Well, for DFS, a final reversal is required. BFS 1classSolution {2public:3vector<int> findOrder(intnumCourses, vector<pair<int,int>...
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. 使用拓扑排序即可,代码如下: class Solution { public: vector<int> findOrder(int numCourses, vector<vector<int>>& prerequisites) { vector<int> res; ...
https://leetcode.com/problems/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] ...
2. 3. 4. 5. Note: The input prerequisites is a graph represented by a list of edges, not adjacency matrices. Read more about how a graph is represented. You may assume that there are no duplicate edges in the input prerequisites. ...
add(n); } } int[] res = new int[numCourses]; int j = 0; while(!zeroQueue.isEmpty()) { Node cur = zeroQueue.poll(); res[j++] = cur.value; for(Node next: cur.next) { next.in--; if(next.in == 0) { zeroQueue.add(next); } } } return j == numCourses ? res: ...
[LeetCode]CourseSchedule书影博客[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...
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
207. Course Schedule 题目描述(中等难度) 给定n组先修课的关系,[m,n]代表在上m这门课之前必须先上n这门课。输出能否成功上完所有课。 解法一 把所有的关系可以看做图的边,所有的边构成了一个有向图。 对于[ [1,3],[1,4], [2,4],[3,5],...