So, hey Codeforces community, as I found some cheaters in Round 1117, I'm writing this blog to expose him! (This blog is not formatted by an AI model)

No 1. Their handle is swayam12, and as you can see, he's a pupil in just 3 rounds,

1. Educational Codeforces Round 191 (Rated for Div. 2), Rank 5153
2. Codeforces Round 1109 (Div. 3), Rank 7207
3. Codeforces Round 1117 (Div. 2), Rank 60!

so, in his first 2 contests, he achieved a decent rank, in thousands, but in his 3rd round, as you can see his submissions:- https://codeforces.me/contest/2257/submission/387410016, https://codeforces.me/contest/2257/submission/387411590, https://codeforces.me/contest/2257/submission/387414976, https://codeforces.me/contest/2257/submission/387434259, https://codeforces.me/contest/2257/submission/387436423 (1 WA), https://codeforces.me/contest/2257/submission/387438401, He achieved a rank of 60, its a top-tier rank! Surpassing many some GMs, CMs, Masters! and most shockingly, in the following 2 submissions:-

https://codeforces.me/contest/2257/submission/387436423 (1 WA), https://codeforces.me/contest/2257/submission/387438401, he just changed his code within 4mins, and came up with a beautiful (though cheated) approach, and wrote a very long code within this short period of time!

2. Their handle is Snehasish123

They did participate in a few rounds before, (the very last round before Round 1117 was a Div 4 round) and here are their submissions of Round 1117:-

https://codeforces.me/contest/2257/submission/387404882, https://codeforces.me/contest/2257/submission/387414548, https://codeforces.me/contest/2257/submission/387419377, https://codeforces.me/contest/2257/submission/387421711, https://codeforces.me/contest/2257/submission/387457660, https://codeforces.me/contest/2257/submission/387461926 (though TLE but still counts as an attempt to cheat!)

In different submissions, they are writing their code with a completely different style and they are literally submitting and getting AC on Problem A -> Problem D under just 2 mins, just with there max solving of just 800 rated problems!

3. Their handle is chinoscode

They participated in both the rounds (Round 1117 and 1118) and here are their submissions for both the past rounds:-

https://codeforces.me/contest/2258/submission/388802177, https://codeforces.me/contest/2258/submission/388812658, https://codeforces.me/contest/2257/submission/387432426, https://codeforces.me/contest/2257/submission/387418987

They cheated so nicely that they renamed all their variable names and thought that we wouldn't know!

4. Their handle is harshwardhan_gh

They participated in Round 1117 and made these submissions:-

https://codeforces.me/contest/2257/submission/387403229, https://codeforces.me/contest/2257/submission/387406987, https://codeforces.me/contest/2257/submission/387411637, https://codeforces.me/contest/2257/submission/387439674, https://codeforces.me/contest/2257/submission/387447339

Normally, they were just solving 2-3 problems in a Div 2 or Div 1 + 2 contest, but suddenly in Round 1117, they jumped to Expert by solving 5 problems! Was the round too easy, or were they cheating? (btw, they just solved problem C of Round 1117 in just 5 mins!)

Ok guys, that's it for today, and MikeMirzayanov and KAN, please check on them to prevent cheating in future rounds, and thank you for beautiful platforms like Codeforces and Polygon
May all cheaters don't cheat

PracticeForces is now open at vjudge!

Includes: Contests Coding challenges Algorithms & problem solving Practice tasks Discussions & tips

We will also have weekly competitions in the group, there will also be topic-based contests. Everyone is welcome — from beginners to experienced programmers.

Join PracticeForces and start solving: https://vjudge.net/group/prg-2026

UPD: There is no contest yet. We are currently building the community and preparing for our first contest. Stay tuned for upcoming contests, practice sessions, and challenges!

UPD2: Discord server- https://discord.gg/HAWA67x6F

UPD3: We'll have a contest tomorrow (Friday) starting at 4:30PM IST
The topic is 2D Arrays, and the contest consists of 9 problems (3 Easy, 3 Medium, and 3 Hard). Hope you guys enjoy the contest!

Contest Setters: me (marvyzy) and powboii

who all from India are preparing for ZCO currently?

In yesterday's codechef contest (Starters 249), the contest was rated. But due to some server error: bad gateway, my code was resetting every time, lagging, etc. I also had a rating loss because of this. Yesterday's day was ruined because of these careless mistakes during the contest, resulting in my rating loss. The problem quality also dropped significantly, these mistakes are unacceptable and I seek help from the codechef contest setting panel that why my rating is reduced? (If server errors were present, the contest should become unrated, just like the last one) And also the last contest was terrible because of these errors.

Here are some of the few points that I'd like to suggest to problem setters and testers:-

1. Reduce server errors, build a back-up site for the participants who are giving contest at present like (codeforces has its own: m1.codeforces.com, m2.codeforces.com, etc)

2. Introduce ad-hoc style + mathematical style problems so that the contest is spaced more and people from other sites (codeforces, atcoder) could also join to attend your contest (i advice you to not keep the contest only dsa style just for clearing interviews, be a proper cp site)

3. If not second point, then plz improve the problem quality so that everyone enjoys the problems (as some people commented in the blog of: Invitation to CodeChef Starters 249 (Rated till 6-Stars) — 29th July)

Thank you,

Dominater069, IceKnight1093, SmolBrain
please look forward to my advice, marvyzy