Direct edges of a tree to maximise pairs of reachable nodes

Revision en1, by infinitepro, 2021-04-01 08:43:11

The title states the problem — source. Constraints $$$N <= 25e4$$$

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en2 English infinitepro 2021-04-01 08:46:16 5 Tiny change: 'raints $N <= 25e4$' -> 'raints $N \le 25e4$'
en1 English infinitepro 2021-04-01 08:43:11 208 Initial revision (published)