Updates on curtailing plagiarism

These are practise problem submissions, not from a contest.

:man_facepalming:

Their submissions from January Cook-off 2022:

https://www.codechef.com/viewsolution/56950044
https://www.codechef.com/viewsolution/56951282

Another pair of submissions from December Lunchtime:

https://www.codechef.com/viewsolution/55404896
https://www.codechef.com/viewsolution/55407834

4 Likes

August Cook-Off 2021 Division 2

https://www.codechef.com/viewsolution/50111491
https://www.codechef.com/viewsolution/50109964
https://www.codechef.com/viewsolution/50111468

All 3 have the same solutions, 100% same.
Please check these out once and deduct accordingly.
@shaily_adm @utkarsh_adm @admin

1 Like

Well thank you @admin. Todays contest was a bit hard for me. Managed to solve only one question but still after seeing that the person i mentioned here was penalised, now i feel light hearted and motivated
Just needed to ask one question: what happens if a person still cheats in the next contest even after getting penalised making sure that this time that he does add white spaces and comments in between
:sweat_smile: :slightly_smiling_face:

1 Like

CHEATING IN JANUARY LUNCHTIME 104
@admin @utkarsh_adm @shaily_adm
please check all these codes are exactly same .
https://www.codechef.com/viewsolution/57381759
https://www.codechef.com/viewsolution/57381875
https://www.codechef.com/viewsolution/57381899
https://www.codechef.com/viewsolution/57382005
https://www.codechef.com/viewsolution/57382050
https://www.codechef.com/viewsolution/57382074
https://www.codechef.com/viewsolution/57382079
https://www.codechef.com/viewsolution/57381765
https://www.codechef.com/viewsolution/57381609
https://www.codechef.com/viewsolution/57381530

1 Like

I have a question. Current Plagiarism detectors can detect this on the basis of code matching only, Like there may be some group where the logic of the problem is revealed and everyone then codes based on their own coding style. We donā€™t have any way to detect/penalize them yet, right ?

3 Likes

This is a problem which cannot be tackled by any type of plagiarism checker but is the sole responsibility of the person giving contest to maintain sportsmanship for the entire community

1 Like

Cheating in January Lunchtime.Problem-PERMXORSUM
https://www.codechef.com/viewsolution/57381029
https://www.codechef.com/viewsolution/57381721
https://www.codechef.com/viewsolution/57382127
https://www.codechef.com/viewsolution/57382135
https://www.codechef.com/viewsolution/57382140
https://www.codechef.com/viewsolution/57382176
https://www.codechef.com/viewsolution/57382207
https://www.codechef.com/viewsolution/57382331
https://www.codechef.com/viewsolution/57382410

Not just these, almost all the solutions of the last 20 mins are the same.

1 Like

Here is one case from January 2022 Lunchtime, please take a look:-
https://www.codechef.com/viewsolution/57380294
https://www.codechef.com/viewsolution/57381665

1 Like

More codes exactly same as these in Q2 of Div2

https://www.codechef.com/viewsolution/57358367
https://www.codechef.com/viewsolution/57377132

Please take a look

2 Likes

Hi,

Weā€™ve completed the plagiarism checks for START21, conducted on 5 Jan 2022, and JAN221, conducted on 7 Jan 2022. Here are the number of users weā€™ve penalized for cheating in these contests:

START21, Div B - 190
START21, Div C - 169
JAN221, Div C - 907

Weā€™ve reduced the rating for each of these users by 275 points. Do report to us if you find more such cases of plagiarism.

Regards
Team CodeChef

12 Likes

Are ratings recalculated after removing these cases ?

4 Likes

Sir , I have been wrongfully charged with plagiarism. I have sent my evidences via mail to help@codechef.com containing pictures of my rough copy where I solved 3 of the contest questions. You can see it and the the time taken by me in solving those questions.
If I would have cheated there then I could have solved all 6 problems and in a very less time . Every question I have solved till now is with my own brain and hardwork not by copying some otherā€™s code. I live in a remote district of maharashtra, from where will I copy when I am giving my contests outside the home as internet speed is very bad inside. I am surrounded by people who even donā€™t know how to use computer. And itā€™s very hard to handle both college and dsa practice but I am still handling it but it feels bad when such kind of problems happens even after putting much efforts so please see my evidences and remove these false plagiarism charges
It is hard to gain +33 rating in one contest and you have reduced 303 rating from my account in a single go . Please look at it

4 Likes

starters 24
cheaters list
exact same code of divisors and reciprocal
https://www.codechef.com/viewsolution/57634690
https://www.codechef.com/viewsolution/57633585
https://www.codechef.com/viewsolution/57622138
https://www.codechef.com/viewsolution/57620935
https://www.codechef.com/viewsolution/57618323
https://www.codechef.com/viewsolution/57612323
https://www.codechef.com/viewsolution/57607846

exact same code of anti palindrome
https://www.codechef.com/viewsolution/57634267
https://www.codechef.com/viewsolution/57632317
https://www.codechef.com/viewsolution/57619665
https://www.codechef.com/viewsolution/57620762
https://www.codechef.com/viewsolution/57618070
https://www.codechef.com/viewsolution/57612238
https://www.codechef.com/viewsolution/57591400
https://www.codechef.com/viewsolution/57615573
@admin @shaily_adm please look through the solutions during the time of plag check

5 Likes

Same code, word to word, character by character canā€™t be a coincidence.

Code 1

Code 2

5 Likes

Stats for START21, JAN221, EXUN2021, JAN222 & START22:

Here are the number of users weā€™ve penalized for cheating in these contests:

START21B - 190
START21C - 169
JAN221C - 907
EXUN21B - 199
EXUN21C - 377
JAN222C - 858
START22B - 581
START22C - 721

Weā€™ve reduced the rating for each of these users by 275 points. Do report to us if you find more such cases of plagiarism.

Regards
Team CodeChef

6 Likes

this is code chef id - " vits_cs201077 " @admin
this man is cheating in long challanges of january
https://www.codechef.com/viewsolution/56730647
https://www.codechef.com/viewsolution/56717719
https://www.codechef.com/viewsolution/56679677

he became 3 star coder just by cheating!!! @shaily_adm

code chef id
" vits_cs201039 "

he is cheating in long challange @admin @admin123

https://www.codechef.com/viewsolution/56955286
https://www.codechef.com/viewsolution/56945598
https://www.codechef.com/viewsolution/56972754

@shaily_adm

Will you now update the ratings of non-cheaters after penalizing the cheaters?

1 Like

Hi, please share your email id and username so we can have a better look at the issue.