We know that a tree has either 1 or 2 centroids. I can find one centroid using simple dfs.
But, if a tree has 2 centroids, Is there a way to efficiently find the other one?
In case you don't know about centroids of a tree. See here
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We know that a tree has either 1 or 2 centroids. I can find one centroid using simple dfs.
But, if a tree has 2 centroids, Is there a way to efficiently find the other one?
In case you don't know about centroids of a tree. See here
Название |
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Got this. Thank you very much!
https://codeforces.com/blog/entry/57593
Thanks a lot!