As I was watching the Global Round 27 ranklist today, I can't stop but notice that 17th place sammyuri was only an IM before contest and pulled off a LGM performance! Not only that, he will become IGM after this contest!

After some research, I realized that Sam also made one of my favorite videos, Minecraft in Minecraft. And he just got an IOI gold medal in the most recent IOI 2024. Although I do not know Sam personally, I would still like to give him my felicitations and I wish him the best future!

Hi y'all, I got AC on today's D 1870D - Покупка префиксов by a way different from the tutorial. I think my solution was very cheesy and am looking for a hack testcase that can WA/TL my solution here 223910585!

Thanks in advance!

Hi, during today's Div.3 contest, I solved E2 by using the similar approach to E1, checking all the k from 2 to 3000 such that 1+k+k^2+...+k^r==n, and only adding some special O(1) checks for cases when r = 2, 3, 4, 5. I think the solutions is probably not correct but I could not find a hack for it. I am looking for a hack that can make the code WA or TLE. The submission is the following: 212679414. Any help would be appreciated, thanks in advance!

Update: I did not get the E2 hack, but I did get a B hack...

I am trying to submit my solutions for 1823D, however, the submissions either do not process, or the system tells me that there is an unexpected error. Is the judge system down or is it just me?

UPD: The judge has an absurdly long queue and I think none of the submissions are being processed. My submission that was submitted 25 minutes ago and is in queue still.