Here are some submissions of F 279625545 279590206 279609951 279581737

All of them have some ANTIHACK macros or something like that. Obviously they can't anti-hack, they just make their codes hackable. But the problem comes: many submissions have slightly difference to others so they can't be easily hacked just by one code. Almost every hackable code needs special designs, which is quite annoying :(

And I also found some lol submissions: 279596731 279629539. They have the cheating codes in the submission, but the submission is surprisingly unhackable lol

Just by checking the codes after sorting by execution time, I found that more than 4 in 5 submissions are hackable, omg...

In EPIC Institute of Technology Round August 2024 (Div. 1 + Div. 2), I failed to solve D2 and got -29, and look at the room I'm in! Pupil and specialist were extremely good at coding and they won ratings from naive CMs just like me!

ravikatharotiya392 failed system test on A, and this is what he submitted 275770575, and needless to say, 100% a cheater. And he had a skipped contest just a week ago.

klu-2100030642cser, converted his code to GO, perl, php with ChatGPT to escape plagiarism check. 275842762 275793939 And I'm pretty scared to see that he hasn't been caught even once in his 16 rated contests, he was a really clever cheater!!!

Just in one room two cheaters came and defeat me so much and I can't help imagining how many cheaters are there in the whole contest! Even problem E of Div1+2 can be solved by cheaters! Now cheaters can cheat their ways to Master! There has to be some measures to fight the cheaters (this is what we were asking for since months ago, but nothing happened). And is it possible to restrict some languages can be used in contests so cheaters have less languages to convert to and can be easier found by plagiarism checker? (e.g. C/C++, python/pypy, java, maybe kotlin?)

In the end, MikeMirzayanov please, at least skip these guys' contest (klu-2100030642cser can probably cheat the plagiarism checker again)

About a month ago I accidentally become a CM after a rating roll back with bug, that certainly can not be counted.

But now I really become a CM! Although with extreme luck (*^ω^*)

I learned C language in Jan 2023, started CP 2 month ago (wishing to join the XCPC team in my university) and learned how to program in cpp and how to use STL just 6 weeks ago, and I made it! I'm in purple now!

I have never been absent from any codeforces round after March 28th, even if some of them was unrated for me, because I was so eager to improve. But for today's Div2, I'm going to stay behind :) Although I have solved a red interactive problem in last Div2 round and there seems to be at least 2 interactive problems in the 5 problems of today's round, I can't take the risk of losing my purple name in 24 hours orz

When I make hash attacks on your G1 and G2, I found these submissions 259187487 259189185 259221469 259227729

These two guys have EXACTLY THE SAME code in G1 and G2, and I was able to hack them with exact the same hacks as well.

And I didn't check their other codes, because my time zone is UTF+8 and it's 3:30 a.m. now and I don't want to waste my brain cells to cheating behaviours. I hope Mike can ban them of this round, and please upvote it to let him see it.

Well, some of you might downvote because I'm trying to hack you:), but... I spotted cheaters! And if you downvote too much, the cheaters may escape:)

Well, as you see, I got a lot of rating and become blue after Codeforces Round 938.\(^_^)/ But... Is this really reasonable?

I got rank 1500+ and a lot of coders near or below my rating at basically the same rankings gained much less than me. How did it happen? It seems like my problem B was never hacked for my qsort(I finally solved ACDEF, B was hacked). Or are there any "Newbie protection" or that sort of things for me?:)