Proof of solution of Problem 700B connecting universities? - Codeforces

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Proof of solution of Problem 700B connecting universities?

Revision en2, by spirited_away_, 2019-08-30 03:05:01

Can anyone give me more detail proof of why the answer to the problem is always summation of min(S[v], 2*k - S[v]).

The editorial is not clear.

History

Revisions

	Rev.	Lang.	By	When	Δ	Comment
	en3		spirited_away_	2019-08-30 03:05:56	68
	en2		spirited_away_	2019-08-30 03:05:01	2
	en1		spirited_away_	2019-08-30 03:04:45	249	Initial revision (published)