Okay so i made a blog yesterday which deleted because of problem 6 solution being very standard...

Long story short, I downloaded all the codes submission of p5 p6 p7 p8 and ran plagarism test using Dolo (reliable opensource software) scraped and got this Old Version and Old Clusters.

Someone suggested to remove p6 because of many false positives. And we generated New Version and New Clusters . And This will help you track more cheaters faster hopefully.

Now its sorted in decreasing order of average plag percent and unique submission. Tho i believe there can be still many false positive plags so Do not panic. Also Anything under 65 is not that concerning.

Rest I took 2-3 days and did for the indian CP community.My aim was for cheaters teams could be sniped easily. Again I meant no harm to Legit Teams I have highest respect for them and they may be false plaged.

Sources: You can also download the dataset from here.

The naming convention is [icpc team no.]_[icpc submission no.].[submission type]

p5_cpp p5_java p5_py

p6_cpp p6_java p6_py

p7_cpp p7_java p7_py

p8_cpp p8_java p8_py

Massive Cheating

We did 6/10 with 0 WAs in First Half. Yet After seeing the leaderboard/Stats it's kind of sad state that I will get 400-500 rank. Even Similar Performance Last year for our team would have gave out almost around 100 rank, at worst case 200-300 but i am shocked.

For reference, Top team from our University did perform similar to present prelims last year and got top 10 in Prelims and this time even after doing 8/10, They are at rank 80s.

If u do not believe lemme show you the stats.

The question were really tough from G-H onwards. We had fun and we believed that ICPC prelims is a fair Competition among every teams. But when i reached home, I heard no Proctoring in Many Institutions due to which they got like all teams Aked. What are we heading towards in this country as a whole if this unfair system is going on, where in our Uni, Everyone, the staff followed strict rules and regulations. But in Some another university someone is using phone , using AI easily, Bragging on Linkedin and Giving contest from their home and Feeling Good. I do feel good we performed very well but the result was not expected. And Plagraism check and AI check you know is very hard to detect in this new Era where smart cheaters can easily fake even if the video is On. Some local Colleges team beating every top colleges team was not my in bucketlist this year.

Anyways, This maybe my Rant but I might not go to regionals due to this but yeah i can cope now. I would not stop my grind but I am tired of this Cheating Stuff. Hopefully ICPC board ban these colleges and make this only reliable competition fair and secure from next time.

The strategy for reporting cheating teams should be targeting and checking the top teams on the tentative lists who have solved 7-10 questions. We should first verify whether they have a background, achievements and CF ratings that support their standings on the leaderboard; otherwise, we should just report them.As the top ones are definitely 90% and more cheaters , we can eliminate most of them. This approach is the most reasonable one to eliminate cheaters, and it gives genuine teams a chance to advance to the regionals.

Let's make the leaderboard cheater free and icpc reasonably good experience for genuine teams.

UPD: Contest Inquiry. Hopefully this tones down significantly.

“It is not important to be better than someone else, but to be better than you were yesterday.” — Master Oogway, Kung Fu Panda

Hello, IIITD!

We are proud to present Prosort[114] (Div. 3). We hereby invite all IIITD students to take part in it.

The round will start on Wednesday, January 14, 2026 at 17:00 IST. You will have 2 hours (until 19:00 IST) to solve the problems.

Note: Only IIITD college students are officially eligible to participate in this round.

The contest will consist of 6-7 problems to be solved in ICPC style format. At least one problem will be interactive , so please make sure to read the guide for interactive problems before the contest.

Rules:

1. The contest will be held on the Codeforces platform.
2. It is recommended to reach the venue 15 minutes prior to the start time.
3. Only IDE will be allowed as there is no need of googling. No switching tabs. No extra sheets except rough sheets are allowed. If found sus, you will be disqualified and perma-banned from the Foobar club and sent to the basement of p1k4.

Prizes: Top $$$\ge 1$$$ people will get membership of the Legendary Club Foobar.

We would like to thank:

• ro_.hi__th._ for special assistance and testing;
• catgirl, grecil, Vidush.rk11 and Pumkinhead_Me for testing;
• p1k4 and wadeda for shortly taking a look at the problemset;
• barium_sulphate and FOOBAR_IIITD for dirty Admin work and give a chance to present my skibidi contest;
• Shobwq for ragebaiting;
• MiracleMagician for creating this problemset;
• MikeMirzayanov for creating Codeforces and Polygon.
• YOU for participating;

We hope that this contest, regardless of your background, rating, and result, will increase your exposure to competitive programming and make you better than you were yesterday.

If non-IIITD students would like to participate:

https://codeforces.me/group/0U62CQraSv/ Join above group ( as participant)

https://codeforces.me/group/0U62CQraSv/contest/664213 Above is link for mirror

Kindly participate in the mirror as it makes it easier for us to separate offline and online participants. Contest will start at 4:45 PM IST

Good luck and have fun!

UPD: EDITORIAL

Congratulations to our Winners!!

1. Mitul_Aggarwal

2. budbak_42

3. ApaarGulati