Revision en3, by vivekr_nirma, 2020-04-10 15:48:33
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 in many more div 3 i saw tree questions , so is that a coincidence or what