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
№ | Пользователь | Рейтинг |
---|---|---|
1 | tourist | 3803 |
2 | jiangly | 3707 |
3 | Benq | 3627 |
4 | ecnerwala | 3584 |
5 | orzdevinwang | 3573 |
6 | Geothermal | 3569 |
6 | cnnfls_csy | 3569 |
8 | Radewoosh | 3542 |
9 | jqdai0815 | 3532 |
10 | gyh20 | 3447 |
Страны | Города | Организации | Всё → |
№ | Пользователь | Вклад |
---|---|---|
1 | awoo | 163 |
2 | adamant | 161 |
2 | maomao90 | 161 |
4 | maroonrk | 152 |
5 | -is-this-fft- | 151 |
6 | nor | 149 |
7 | SecondThread | 147 |
7 | atcoder_official | 147 |
9 | TheScrasse | 146 |
10 | Petr | 144 |
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;
}
Название |
---|
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).