whitepalace's blog

Cheating in Round 923(Div 3)-Problem E
By whitepalace, history, 9 months ago, In English

There are many similiar codes in Problem E of Round 923(Div 3) which cause unfair to genuine coders.

Here is the plagiarized code:

#include <bits/stdc++.h>
using namespace std;
#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) 42
#endif
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int tt = 1;;
  cin >> tt;;
  while (tt--) {
    int n, k;
    cin >> n >> k;
    vector<int> v(n);
    vector<int> a(k);
    a[0] = n; 
    a[1] = 1;
    for (int i = 0; i < k; i++) {
      int sign = (i % 2 == 0 ? -1 : 1), move = 0, mn = n + 1, mx = 0;
      for (int j = i; j < n; j += k) {
        v[j] = a[i] + sign * move++;
        mx = max(mx, v[j]);
        mn = min(mn, v[j]);
      }
      if (sign == -1) {
        if (i + 2 < k) {
          a[i + 2] = mn &mdash; 1;
        }
      }
      else {
        if (i + 2 < k) {
          a[i + 2] = mx + 1;
        }
      }
    }
    for (int &it : v) {
      cout << it << ' ';
    }
    cout << '\n';
  }
  return 0;
}

Here are the submission Links:

245224542 (Added Unnecessary variables)

245212452

245227590

245206405

245224640

245214010

245192424 (Changed to Perl)

245196819

and many more similiar submissions.

We know that the blog gets downvoted by many cheaters.

MikeMirzayanov plz take some actions against cheaters.

  • Vote: I like it
  • +47
  • Vote: I do not like it

»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

Auto comment: topic has been updated by whitepalace (previous revision, new revision, compare).

→ Reply
»
9 months ago, # |
  Vote: I like it +9 Vote: I do not like it

There had been other rule violations in this round. Check

→ Reply
  • »
    »
    9 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    yes also in my comment first and last one has made unnecessary variables uses too in both problem D and E . Both are exact same sols.

    → Reply
»
9 months ago, # |
← Rev. 2   Vote: I like it 0 Vote: I do not like it

245222710 all the cheaters have this same code for problem D. Eg: 245206997

→ Reply
»
9 months ago, # |
← Rev. 3   Vote: I like it +3 Vote: I do not like it

from here one can observe that they cheated from there as there same sols got posted. With just minor variable changes plus some extra variables which have no meaning like in the 245222848 submission he/she used two for loops instead of one just to avoid getting detected. similarly 245220824, Thanks to othmaine for sharing the link with me from where sols the cheaters got .

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

If cheaters were removed, my ranking would improve by thousands for sure.

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

hey guys I am new in cp , I have only participated in hello 2024 and the yesterday's div 3 contest. But for the hello 2024 , I got rated +373 but for yesterday's contest (923) I have solved 1 problem correctly (the 1st one) but it didnt give me any rating and in profile it also doesnt show I have participated in the contest. Why is that?

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

Pls block them if they did it more than once after warning

→ Reply
»
9 months ago, # |
  Vote: I like it +1 Vote: I do not like it

I believe there will be a temporary rating rollback for this round to remove those cheaters' submissions

→ Reply
»
9 months ago, # |
  Vote: I like it -8 Vote: I do not like it

stop crying for once bruhh

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

when the logic is the same for different people it is probably they will have code that will look similar i don't think you can tackle that problem.

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

I think there should be a report option so the team can take appropriate actions against them..

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

an action should be take against them.cheating detection system should be made more powerful.

→ Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

245183505 look at this users submissions

→ Reply
  • »
    »
    9 months ago, # ^ |
      Vote: I like it 0 Vote: I do not like it

    Hope so when temp rating roll back happens then all those cheaters links posted here gets penalised.

    → Reply
»
9 months ago, # |
  Vote: I like it 0 Vote: I do not like it

most of the solution are not yet skipped in the op. 245222848 245220824 245222953 like these ones of mines too .I request MikeMirzayanov to please look into these too . system tests might fail to recognize them but you will def understand after seeing their solutions.

→ Reply