Sometimes when we search a bout trees problems ... We get problems that contain queries but with trees I think that this problems have a good tricks and so hard to find these trick so if anyone have an idea about how to solve problems that contain trees and queries .. pls give me resource how to learn and problems to solve and thanks for all and sorry for bad english .

Hi everybody .... after along long time i get Specialist and that also amazing but i ask my self if I can get expert too so I search how to be expert ... can you help me pleassee ??

Today was codeforces contest (good bye 2023) Good Bye 2023 My message for every body got runtime in the rejudjing... If you look to the bad side you got wrong on easy problem and that is very bad but .... If we look to the good part in these contest It was super math contest and they give problem A 1916A - 2023 only 250 points so think if the contest was by penalty so here all of the people going to lose a lot of rating So everyone should give a big thanks for codeforces and have a nice holiday