3 weeks till the next contest which is a div4 ? Yes, it is a chance to do more practice ,but I think there had been an EDU scheduled to be on these days and due to some reason got cancelled. Anyways, I suggest filling this period gap by an EDU round.

Thanks ✪ω✪ MikeMirzayanov. Now, a div3 is added.

As shannuvk has been recently banned because of 3 skipped contests, I request banning FCI Kafrelsheikh University's topper. The Cheat ART Mhmd_Bakr, he has also 3 skipped contests and previously banned accounts as mohamedbakr or even accounts skipped >= 4 but not yet banned as AlgoTurtle. It's just what I don't get, how shannuvk gets banned and they leave that bakr spoiling the platform from different accounts. I previously mentioned he is in total skipped >= 13 times from different accs. It's also evident upon seeing his codes that he is an obfuscator. There're many blogs on this account proving his cheat and many other approvals that Mhmd_Bakr is a cheater like this one by a Master. And he is even worse than shannuvk. So please ban Mhmd_Bakr. My comment with this request had 29 upvotes in less than an hour. So it's high time to BAN Mhmd_Bakr. THANKS! ✪ω✪

Like those 10 year badges. Will it be available soon ? A 13 year badge would definitely be a cool idea.

4 hour queue..

I see it took longer than normal to be updated..

Am I the only one who thinks the pretests were too weak ? Tons of C submissions are getting hacked.

Or we really gonna have a double game week on 18th of June?

Cheaters are a disgrace! How such an obfuscator Mhmd_Bakr becomes an expert? His old account mohamedbakr has been banned before due to his cheating. I see his cheat art developed so much that he became an expert!

I really wonder when such a cheater gets banned he cheated thru different accounts and got skipped 12 times and of course he cheated last div3 that got him a promotion to expert spoiling the competition for fair contestants.

He told MinaRagy06 on a facebook group before that he does so (obfuscates so "people don't hack him" and tried to fakingly justify his FST for a soln 191590427 he cheated from YT video and said words ("I tried randomly the inversion count") and the problem has nothing to do with inversion count, but rather MOD inverse (Mina told me that story on a codeforces message)

I think this clearly indicates he is a cheater who didn't even understand the algorithm or what he copied and didn't know anything about the problem's topic combinatorics and modulo arithmetic)

And also spreading misinformation celebrating his cheat achievements on LinkedIn.

You can find his linkedin post celebrating his cheat achievements copying 1k problems and being a specialist.

I really can't understand why vote changed from positive to -31 on this and my contribution still +127. Most of downs are temp accs. As the respected master aymanrs mentioned before there. The down-votes are probably from the cheat gang. This post includes all evidence for mhmd_bakr cheating and also misinformation spread.

Please, upvote this blog if you think such a dumb cheater who spoils the platform and spreads misinformation every now and then like Mhmd_Bakr should be skipped and banned. Even his cheater friends like Elsaghir or BnKhalid stopped cheating with him because he is too dumb.

Thanks! ✪ω✪

The just finished leetcode weekly contest. Why on earth problem D had higher Accept rate than C though D is supposed to be harder as leetcode arranges according to difficulty ?

Some statistics(contest submissions only) as evidence :

Problem C :
User Tried: 7872 User Accepted: 3349

42.5% success rate

Problem D :

User Tried: 5072 User Accepted: 2309

45.5% success rate

Problems rate help a lot on upsolving, they're not added for the last couple of rounds. Please, add them for rounds #845, #846, #848, #850, #851, #852, edu #143

Cheaters' Wrong Answer on 24 for problem D was too funny today, to be honest xD. Those stupid people got what they deserve. Tricked into thinking it is their biggest positive delta, but on the day's end it turned negative! lol.

Bruhh WTF! 12 skips in total? Again cheating in the last educative round 141 C and thankfully the plagiarism system became smarter as it spotted you immediately 190392625? Tell me, do EDU rounds involve room-code locking, that you brainlessly complain of as being the reason for your div2 skips, you are even an idiot who doesn't know how things work. In div2, the first to submit the code is NOT skipped, so your claims are utter shit as you. You had been skipped 4 times (Two Automatic by the plag check system ,and 2 Manual by MikeMirzayanov or moderators)

Are you brain-crippled? Mhmd_Bakr I thought my blogs taught u something! You can't do competitive programming and you can't even cheat lol! Please, go do some other shit. I think competitive programming is not for you and your cheater friends!

Finally, let me here put your dirty cheating history. Thanks redc, Some Osint : Name : Mohamed bakr. Country : Egypt. From : FCI Kafrelsheikh University CodeForces Accounts of "Mohamed Bakr" :- 1. mhmd_bakr (4-skips) 2. mohamedbakr (Already BANNED, 4-skips) 3. AlgoTurtle (4-skips)

This user Mhmd_Bakr was recently skipped in 186942021, yet STILL in competition. So in total he solved only 2 questions in Div2 #841 with rank 4898. Yet, in his contests bar, Though it shows he solved 2, The rating change is still +87 and rank 1842 as if he had solved 3 and new rating 1345. Please, re-update this cheater's rank or skip his all 3 solutions so he gets penalised for his wrong doings! It may have also happened for other cheaters who had been skipped manually. Thanks! ✪ω✪

UPD: A lot of time passed. yet his rating change and rank are not correct, I think other people's rank is harmed by this. I hope a moderator re-corrects this cheater's rank and rating change. Thanks ✪ω✪

LOL! The cheater-gang are down-voting using fake accs as blog went from +80 to +54. Actually, my contribution is still +114 which means the ill posed cheater is using temp accounts.

UPD :: The cheater deliberately down-voted one comment for redc which included his different accounts, that were SKIPPED 12 times, so let me put redc's comment content here as ID for the dumb cheater Mhmd_Bakr

Some Osint : Name : Mohamed bakr Country : Egypt From : FCI Kafrelsheikh University

CodeForces Accounts of "Mohamed Bakr" :- 1. Mhmd_Bakr (4-skips) 2. mohamedbakr(Already BANNED, 4-skips) 3. AlgoTurtle(4-skips)

@ MikeMirzayanov and all moderators here, please fix that bug it seems common and lots of time passed. Another similar case reported by Muhammad_Aneeq and Busted for Sir-Ahmed-Imran in Polynomial Round(div1+2). It's strange tho skipped, but they get the same old incremental in points before SKIP ? Please, look into it. I suggest rolling back the ratings and correct those cheater ranks as they disrupt the standings. Thanks! ✪ω✪

I previously warned this shameless creature Mhmd_Bakr along with his cheater friends like Elsaghir in that blog. Yet, he seems finding words difficult to understand O.O. He obfuscated and cheated again in the most recent round #841 disrupting the leaderboards adding useless comments and his characteristic useless classes as color.cyan() in his submissions. See his skipped sub for problem C 186942021.

Some snippets from his submission that clearly indicate he purposely obfuscated to evade plag:-

/*if (mem.count(n)) return mem[n];
if (n == 1)return 1;
if (n == 2) return 1;
mem[n] = fib(n - 1) + fib(n - 2);
return mem[n];
--if (num == 1) return false;
int ch = 2;
while (ch * ch <= num)
{
    if (!(num % ch)) return false;
    ch++;
}return true;*/

also, why return -12 in your so called dfs function. This is very weird. Do you have a new thesis in Computer science returning -12 ? Also, the fn has nothing to do with dfs.

He is not skipped yet. Though the points are re-calculated. I don't know for how long will those idiotic cheaters mess the contests' standings and fool the system by adding useless parts and useless comments, and make people's rating suffer! and is promoting those cheaters to higher ranks an encouragement for them to continue and harm other people?

I hope a moderator review and skip his 186942021 and ban such dishonest person and his likes since he is spoiling the competition for fair contestants. He Mhmd_Bakr was already skipped/plagged thrice before and 4-time skip on his AlgoTurtle. Please intervene as the likes of this person spoil the standings s_jaskaran_s MikeMirzayanov The goal of such blogs is to enhance our admired codeforces platform in skipping cheaters, Thanks to MikeMirzayanov and every moderator! Lots of good work is going on codeforces in end of the year. Last round #841 was awesome, only cheaters like Mhmd_Bakr spoilt and hope the last round of 2022 tomorrow would be nice as well!

UPD: That shameless creature's punishment was to get +87 inspite of all the evidence of his cheating above! It's so strange how a naive brain like him managed to fool the system and harm others disrupting the standings!

UPD2: I just saw something too funny, so couldn't resist but sharing with u fellows ✪ω✪. Bakr is plagged 11 times in total :O Visiting the dumb cheater Mhmd_Bakr's organization; FCI Kafrelsheikh University. I found that he had two other accounts ; mohamedbakr and it seems banned, having the same name he put on Mhmd_Bakr and same characteristic void color and color cyan xD Also, AlgoTurtle, so 4 time skip on mohamedbakr, 4 time skip on algoturtle, 3 time skip on mhmd_bakr (11 in total) and We urge a moderator to make it 12 and 4 for mhmd_bakr as he cheated again last round. Thanks and Happy new year codeforces folks. May we all have a positive delta today ✪ω✪ ^_^

+70. I think there's a general approval in the community that Mhmd_Bakr is a cheater. In the last day of 2022, can we celebrate the ban of such shameless cheaters? Please, skip his 186942021 and ban him sir MikeMirzayanov

UPD3: He is skipped now! But His rating still needs be updated(downed as he still has +87). Sorry for the too long blog xD and Thanks Sir MikeMirzayanov for your justice, now leaderboards are fine for the 2 recent rounds! And all those cheaters skipped. You are a JUST man and CODEFORCES will remain the most prominent CP platform, where there is NO place for cheaters. I'm full of PRIDE that I helped the community to cleanse cheaters and that my time doing this wasn't in vain.

UPD4: His prize for cheating and using fibonacci for no reason was +87 points on that round, how on earth solved 2 and rank 1842 the system has a bug :(

I guess he cheated also on the recently finished round, but had learnt how to obfuscate well as this blog hammered him XD!

Encara messi! Encara messi! Sorry for off-topic, but it was really brilliant performance by Argentina. Messi's hard work for years wasnot in vain!

I started coding after discovering about MikeMirzayanov's history in cp and his great codeforces platform that inspired me and thousands of competitive programmers all over the world, so to honor him, I made a drawing of him. Thank you MikeMirzayanov for inspiring me to begin learning such an incredible subject and your efforts to keep codeforces a fair environment skipping and banning cheaters.

PS: please upvote, showing our deepest appreciations for Mike's efforts.

This user Mhmd_Bakr has cheated very badly that he became specialist, he only obfuscates his code and it is obvious since he adds huge number of useless comments and strange code with color.white(), color.cyan() , unnecessary classes and STLs as in submissions; 182524617 ,and last round : 1764C 182697157. He even got skipped verdicts before due to cheating in div2 #833 with 180653605 , 180635849. I wonder what he and the one he cheats from gain from this?

Nevertheless, this cheater had a previous account named AlgoTurtle and had been PLAGGED 4 times due to cheating. You can find similar template, obfuscation style in both accounts, take for example 176022369 and 175641827. Also, both accounts had been assigned to the same organization; FCI Kafrelsheikh University, but he removed from AlgoTurtle, but still there in Mhmd_Bakr. He cheats in almost all the rounds but gets caught in 10% only with his new account Mhmd_Bakr, became an experienced cheater and plag evader xD, so that's the reason I have written the blog as I hope to contribute to cleansing the codeforces community from those idiotic cheaters as they really harm other hardworking people's rank and effort.

Really, cheating does wonders in only 11 contests, he managed to be a specialist WOW ! Also, why false positives take place like that BLOG for silvermax and on the other hand, cheaters continue cheating from multiple accounts without getting penalised? why there isn't an IP BAN not only an account ban to avoid those cheaters spoiling the community every now and then?

He is not skipped yet. I don't know for how long will those idiotic cheaters fool the system by adding useless parts and useless comments, and make people's rating suffer! I hope Mr.MikeMirzayanov or any moderator to do a manual check on those accounts Mhmd_Bakr and AlgoTurtle skip such dishonest person and his likes since he is spoiling the competition for fair contestants.

UPD : Thanks Sir MikeMirzayanov for your justice, now leaderboards are fine and all those cheaters skipped. You are a JUST man and CODEFORCES will remain the most prominent CP platform, where there is NO place for cheaters. I'm full of PRIDE that I helped the community to cleanse cheaters and that my time doing this wasn't in vain. Congratulations Mhmd_Bakr for getting skipped in two very recent contests Global round 24 and div2 #836. Warn your cheater pupil friend Elsaghir not to cheat again. I guess he cheated in a clever way last global round. Anyways, I'm happy to have helped the community. I love codeforces <3

Cheaters are a disgrace to the community. Leaderboards are so messed for the last round #824, cheaters solving both C and D was absolute shit. Of course Cheating in problem D was so evident since it is the same python code, but not only D was leaked in python, problem C was also leaked in c++ and below you can find almost same solutions OBFUSCATING their codes to fool the system

174427324 174419555 174427324 174421050 174415745 174418707 174418621 Those are just few examples, many have the same code for C. Cheaters like xypnx, Elsaghir, rank01, Mohd_aman000 I mentioned those users especially as they had previous incidences of being skipped due to cheating. Mohd_aman000 with 173218748 in #822. Elsaghir with 171923739, 171894077 in Div3 #820, rank01 with 172708053 in #821

Those people are killing the transparency of codeforces contests, for how long will people's rating suffer due to those idiotic cheaters? Those cheaters messed the round very much Akulyat Please intervene sir MikeMirzayanov and ban those users or at least increase the penalty against Cheating.

UPD : Thanks Sir MikeMirzayanov for your justice, now leaderboards are fine and all those cheaters skipped. You are a JUST man and CODEFORCES will remain the most prominent CP platform, where there is NO place for cheaters. I'm full of PRIDE that I helped the community to cleanse cheaters and that my time doing this wasn't in vain.

UPD2 : Congratulations Cheater Elsaghir, now you had been out of competition with all your submissions SKIPPED and the most important -121, how about quitting CP bro with your cheater friend? Hope you learnt the lesson ^^