Is last quetion of div 3 always on trees ?

Правка en2, от vivekr_nirma, 2020-04-10 15:47:32

I have seen many times that last/second last question of div 3 is on trees like
- 627 f teached me about rerooting
- 629 e teached me prefix postfix number
- 624 e constructive algo on tree
and i many more div 3 i saw tree question , so is that a conicidence or what

Теги trees, div 3

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en3 Английский vivekr_nirma 2020-04-10 15:48:33 4
en2 Английский vivekr_nirma 2020-04-10 15:47:32 17
en1 Английский vivekr_nirma 2020-04-10 15:46:40 460 Initial revision (published)