int[][] edges = {{0, 1}, {1, 2}, {2, 0}}; boolean result = so.hasCycleDirectedGraph(3, edges); System.out.println(result); } } Detect Cycle in Undirected Graph 无向图找环 Given n nodes labeled from 0 to n - 1 and a list of undirected edges (each edge is a pair of n...
Looked through LeetCode and came across the problem above. It doesn't have Editorial solution and it doesn't seem like a well-known problem from major lists that people use to prepare for interview...
DirectedGraph(intN):n(N),adj(N,list<int>()){};voidaddEdge(intu,intv){//to add an edge u->v to graphadj[u].push_back(v); }boolisCyclic(){//If has back edge, then has cyclevector<bool> visited(n,false); unordered_set<int> recStack;//recursion stackfor(inti=0;i<n;++i...
vis[i]){ 55 vis[i] = true; RecStack[i] = true; 56 if(isCyclic(edgelist,G,vis,RecStack,i)){ 57 cout<<i<<" starts a cycle"<<endl; 58 } 59 RecStack[i] = false; 60 } 61 } 62 63 return 0; 64 } 分类: 数据结构 好文要顶 关注我 收藏该文 微信分享 流白 粉丝- 22 ...
48 changes: 48 additions & 0 deletions 48 ...-in-a-Directed-Acyclic-Graph/2192.All-Ancestors-of-a-Node-in-a-Directed-Acyclic-Graph.cpp Original file line numberDiff line numberDiff line change @@ -0,0 +1,48 @@ class Solution { public: vector<vector<int>> getAncestors(int n, vect...