Need help in optimization

Revision en2, by Jack_Daniels_, 2024-12-07 20:34:04

I have a problem: given a tree on N vertices, I need to answer requests with 2 types:

1)Delete I-th edge if it's in the graph (or vice versa).

2)Find a maximum matching in a component including vertex X.

I have a solution: dfs with DP on tree to count maximum matching on each request, but N and Q <= 1e5 and I've TL. Please tell, how I can improve this?

My current solution

P.S. This is my first blog, please dont kill me for some possible mistakes:)

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  Rev. Lang. By When Δ Comment
en2 English Jack_Daniels_ 2024-12-07 20:34:04 153 Tiny change: '2 types:\n1)Delete' -> '2 types:\n\n1)Delete'
en1 English Jack_Daniels_ 2024-12-07 19:15:58 373 Initial revision for English translation
ru1 Russian Jack_Daniels_ 2024-12-07 18:16:50 373 Первая редакция (опубликовано)