I don't find any solution idea for this problem . I am totally stuck in this problem . If anyone solve the problem , please give me the idea for this problem . Thanks in advance !
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Codeforces (c) Copyright 2010-2024 Михаил Мирзаянов
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Auto comment: topic has been updated by rajon_aust (previous revision, new revision, compare).
OP changed the question from HIGHWAY — > HIGH . This comment is uselss
can you explain your idea please . thanks !
Auto comment: topic has been updated by rajon_aust (previous revision, new revision, compare).
I think the problem is just counting spanning trees
Any more good resources to understand the algorithm ? Thanks a lot for giving the link of algorithm .
Just try Googling "counting spanning trees," or "Kirchoff's theorem" and there are a lot of sources. Here's a proof, and here's how to find a determinant
Thanks a lot ! I will try my best to solve the problem .
Thanks a lot . Finally I solved the problem !