Updates on curtailing plagiarism

aniketpawar · March 9, 2023, 10:38am

Contest – starter 80 div-2

Question link - C8KBFTREE Problem - CodeChef (c8kbf and Tree)

YouTube video. - - YouTube

similar solutions

abhi_kant · March 10, 2023, 8:07am

hats off to your hardwork bro

hrishik85 · March 10, 2023, 3:00pm

@vatsalsharma_3 - Users with plagiarism flags in 3+ contests have been banned today. We didnt do this activity this in Jan / Feb.

math_pi · March 14, 2023, 3:57am

Time should be reduced to 2 hours and please hold more contests other than starters!

nikhi_0118 · March 17, 2023, 10:10am

ok

yuvi_735213778 · March 19, 2023, 7:05pm

Why are you worrying so much about cheaters ,they are going to do nothing in their life.
Dont worry about rank, our aprroach should be skill.

ashnub425 · March 22, 2023, 6:05pm

kofin · March 22, 2023, 6:27pm

START82D:
Plagiarised code on Problem ALIKE_THEM:

honest_dude · March 24, 2023, 12:44pm

@admin

Kindly look at below telegram channels which provides solutions while contest is ongoing. Kindly look at these channels before they may can change links/names.

Telegram: Contact @codeforces99 [Paid Solution Provider]
https://t.me/codechefalive[Paid]

These Channels directly provide solutions to users either on demand(Payment) or free of cost.

ankurkr03 · March 25, 2023, 10:42am

good

ashnub425 · March 28, 2023, 2:07pm

i saw the leaderboard for above screenshot with all submissions disqualified but ranking remains in top 100 how is it possible?
Its totally unfair.
@admin plz look into this check rank 5,7,8,9,13

admin · March 29, 2023, 10:40am

The ranklist will look like this till the plagiarism process is over for that contest. For START82, it should be over soon.

shubham27dec · March 30, 2023, 7:20pm

Ratings would also update right once the plagiarism process is completed… the ratings of honest contestants really goes down in the final hour of the contest because of these cheaters.

admin · March 30, 2023, 7:48pm

That is done after a month.

ashnub425 · April 5, 2023, 5:08pm

List of plagiarized submissions in problem AWESUM_OR (START84D):
1)CodeChef: Practical coding for everyone
2)CodeChef: Practical coding for everyone
3)CodeChef: Practical coding for everyone
4)CodeChef: Practical coding for everyone
5)CodeChef: Practical coding for everyone
6)CodeChef: Practical coding for everyone
7)CodeChef: Practical coding for everyone

@admin plz ban these users with more than 3 plag marks
@admin plz update the rating and plagiarized users before next contest starts
I am very worried that rating hasn’t updated after the removal of cheaters from START82

honest_dude · April 12, 2023, 4:45pm

#include <bits/stdc++.h>
using namespace std;

#define int long long

bool isOK(int p, int k, vector<vector> &a, vector<vector> &dp)
{
int n = a.size() - 1;
int m = a[0].size() - 1;

bool ok = false;
for (int i = 1; i <= n; i++)
    for (int j = 1; j <= m; j++)
    {
        if (a[i][j] == 0)
            continue;

        int x1 = max(1LL, i - p);
        int y1 = max(1LL, j - p);
        int x2 = min(n, i + p);
        int y2 = min(m, j + p);

        int sum = dp[x2][y2] - dp[x2][y1 - 1] - dp[x1 - 1][y2] + dp[x1 - 1][y1 - 1];
        if (sum >= k)
            ok = true;
    }

return ok;

}

signed main()
{
ios_base::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);

int t = 1;
cin >> t;
while (t--)
{
    int n, m, k;
    cin >> n >> m >> k;
    k++;

    int sum = 0;
    vector<vector<int>> a(n + 1, vector<int>(m + 1));
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
        {
            cin >> a[i][j];
            sum += a[i][j];
        }

    vector<vector<int>> dp(n + 1, vector<int>(m + 1));
    for (int i = 1; i <= n; i++)
        for (int j = 1; j <= m; j++)
        {
            dp[i][j] = a[i][j];
            dp[i][j] += dp[i][j - 1];
            dp[i][j] += dp[i - 1][j];
            dp[i][j] -= dp[i - 1][j - 1];
        }

    if (sum < k)
    {
        cout << -1 << endl;
        continue;
    }

    int lo = 0, hi = max(n, m), md;
    while (lo < hi)
    {
        md = (lo + hi) / 2;
        if (isOK(md, k, a, dp))
            hi = md;
        else
            lo = md + 1;
    }

    cout << lo << endl;
}

}

TripTastic Plagged code

Kindly ban all who used this code for cheating in Triptastic. I have posted after Contest.

guptaharsh23 · April 12, 2023, 4:54pm

I am very sad due to online cheating , I was able to solve 3 question in div2 within 35 minute , after that i have given lots of time in 4th question but not able to solve further . My rating decreases due to cheating .

Got to know that cheating was happening in telegram , please check these 2 telegram link where cheating is happening . I have reported these channels , everyone please go and report .

honest_dude · April 12, 2023, 4:55pm

https://www.codechef.com/viewsolution/94355033
https://www.codechef.com/viewsolution/94354405
https://www.codechef.com/viewsolution/94354717
https://www.codechef.com/viewsolution/94354967
https://www.codechef.com/viewsolution/94354999
https://www.codechef.com/viewsolution/94354522
https://www.codechef.com/viewsolution/94354525
https://www.codechef.com/viewsolution/94354586
https://www.codechef.com/viewsolution/94354653
https://www.codechef.com/viewsolution/94354671

Every Solution in div 2 and div3. I checked for div2 and div3 only right now . Every solution is same as I posted above. All are doing Copy paste, Changing names. Why no action? Previous time no action was taken?

anon96194809 · April 12, 2023, 7:47pm

EPANLNK plagiarised code

Crazy Bishops on Chessboard plagiarised code

TELEGRAM group link: Telegram: Join Group Chat
@admin Please look into this and ban users having the same code as in the above images and get this telegram group deleted ASAP.

anon13454071 · April 14, 2023, 3:51pm

I got wrongly plagiarized, please don’t down my ratings. You can check my previous records. I had never been indulge in this type of activity.
It took months and years hard work to achieve this rating. please don’t down my ratings.