Is this code to detect cycle in an undirected graph correct. I have run it on a few test cases and it seems good . Can someone from the community verify it.
code:
code
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Is this code to detect cycle in an undirected graph correct. I have run it on a few test cases and it seems good . Can someone from the community verify it.
code:
// p is parent
// s is source
// adj is adjacency list representation of graph
// path is to store cycle and is a set
// ch is children/neighbor of s;
bool dfs(ll s,ll p)
{
visited[s]=true; for(auto ch:adj[s]) { if(ch!=p&&visited[ch]) { path.insert(ch); return true; } if(!visited[ch]) { if(dfs(ch,s)) { path.insert(ch); return true; } } } return false;
}
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why down-voting
Because your question is not precise. It's not a good way to ask the community to verify code for you, instead, it may be better to explain your approach in a few sentences or ask for some resources in this topic (of course after searching and not finding anything useful).