It is really helpful thx! I was able to include bits/stdc++ before but after a system update or something it did not work anymore. Took me quite long but could not fix it now it works again

Thank you so much, I've made a huge logical flaw. Not only power of 2 can contribute, all even numbers can contribute.

Hi, can anyone please help me with my solution to D solution. I've been debugging it for some time, but idk whether it is the way I found largest power of 2 below n gives the wrong answer. Thanks a lot in advance!

The title Apprentice is removed right?

Got it, thank you for your reply

But it appears in the unrated contests in my profile page haha

May I ask whether I would be rated for this round or not? By the rules stated in the announcement, I am not a trusted participant yet(since I took < 5 rated rounds). But according to this line "Regardless of whether you are a trusted participant of the third division or not, if your rating is less than 1600, then the round will be rated for you.", I assume I should be rated for this round. Thanks in advance to your answers