In the ongoing hacking phase of Educational Codeforces Round 75 I have caught people red handed hacking their solutions of their own fake accounts . What they will do is put something nonsense like this on top of their accepted code : if(string=="dfdfdf34") print("12")
One can easily hack this solution by providing a test case like: 1 dfdfdf34
Like I caught this guy https://codeforces.me/profile/Amr_Abdelazim01
https://codeforces.me/profile/amr_abdelazim Both of these accounts are owned by 1 person and the guy hacked using the method I explained above like 12 times. And this is not the end https://codeforces.me/contest/1251/submission/63335128
https://codeforces.me/contest/1251/submission/63316807
https://codeforces.me/contest/1251/submission/63342216
https://codeforces.me/contest/1251/submission/63341635
https://codeforces.me/contest/1251/submission/63344050 And there many more like this . The person who hacked such solutions is probably the culprit. Admin please look into the issue people like these are ruining the platform badly. God people will do anything for the rating.
Hacks don't help you increase rating in Educational Rounds.
yup but who knows for how long they have been doing this in other contests where hacks does increase rating . Maybe they are unaware that hacks doesn't increase rating in educational rounds.
In other contests, where hacking gets you points, participants are divided into rooms, one can only hack in one's own room, so both of these accounts of such person have to be in the same room, hence chances of such cases in other contests is very low.
How many fake accounts one should make to ensure 99% probability that atleast two of his accounts are in the same room?
credit: Birthday Paradox
just kidding:)
That is much more difficult, as hacking in normal rounds is only possible in rooms, and the rooms are made randomly. So it unlikely that the fake account and real both are in the same room.
However, this is still unethical.