We would like to invite you to participate in the Aleppo Collegiate Programming Contest 2026, which was held on September 3 in Aleppo, Syria.
The problems were authored and prepared by: Mohammad_Hacker, Khaled_Al_Awad, rasoulist, and me.
Also, we would like to deeply thank everyone who tested the problems
Um_nik, jeroenodb, __baozii__, pashka, Arpa, ApraCadabra, Wael_Zaiback, ali2005_syr, Khalwsh, Sersawy, Tamatem.1, MUZAN, _SHAHIN, Ali_Azzam, Mr_Bald, pharaok, MEDAAA, BluoCaroot, Moatazoleq, M0N, Whoname, ezraft, Wageeh, Mousa, Homz, MTSS, rafieefatemeh, Mezo_ZK, Alaatnt, I_m_a_newbi, MHMD_3R, Monzer_DA, MazenXv, AmmarShereer, A.M.X, Ali_taste, plastmassovyi_mir, GM_Dan4Life, Danasaur, lujain_sh, MEEDL7, BachTrack, The_Kaghed, A_New_Jaafari, Bash., alaa-_-, kareem_Bizreh, Alaaalshahror, abdulrahman_204, Omar_Al_Midani, assmaa.qa, Aminaainia05, Mrs.Bee, ASPER, Haidar.alhakeem, M0ZA7ER, HashemSi
Whether you want to yell at thank the problem setters, just look for the ones in gray. (Oh, and replace Apraham with rasoulist—it's only an 800-rating difference, basically nothing!)
We hope you enjoy the problems, GLHF!
As a Tester i really enjoyed writing "as a tester" <3 .
The problem set is awesome, and I'd say it's definitely worth your time.
As a contestant, problem D is the one of the best problems I have solved in my entire life. And BTW I was running from school to home 14 years ago ;)
As a contestant , I think that problem D is the perfect stress test for felol :)
As a tester,hamoosh is not hamooshing any more
As a Tester the problem setters are your uncles. And the problems are very awesome.
وحلبية حلبيةةة
As a contestant , I think that problem A should be a very black problem so i could submit the extreme problem on it with no problem
)
tester as a
As a super volunteer, the competition was an amazing and enjoyable experience, filled with anxiety, exhaustion, enthusiasm, and the energy of code.
As a tester, I don't know what to say except great problems.
thanks guys
I appreciate your efforts
As Abu Dujanah I can confirm that theINVINCIBLE is a fulol.
As a not Fulol, I can confirm that you submitted the extreme problem on problem A by accident, if this isn't fulol behavior, then I don't know what is.
Fair enough , but
Qalbi tayyeb , kteer Qalbi tayyeb.
3rrrr
Very nice problems!
As a Tester...
damn that felt good.
the problem setters are GOATed btw.
and Apraham must be a paid actor in the photo.
As a tester, the problem set was extremely fun to test! High quality problems, GLHF everyone!
if ( taste is a tester && Grizoo is a problem setter) great problemset
What is the intended complexity for F?
I did a $$$O(n \sqrt{n\log n})$$$ and it surprised me how fast it worked: 390ms
UPD: A simple brute force $$$O(n^2)$$$ passes in 546ms, so it seems that testcases are just incredibly weak.
(The case with max n and 1 2 3 ... n (or any permutation) already breaks this brute force)
Thanks, Solved
$$$O(n\sqrt{n}\log n)$$$ ran in 359ms for me
Isn't yours actually at least $$$O(n \sqrt n \log n)$$$ ?
I tested it with a custom test and it took 15 seconds while my submission took 300ms.
I think it's just that test data is still weak and wasn't prepared for the heuristics you added.
It's not the same approach at all.
Yeah, tests are weak it seems
I said at least because there is a case that achieves that complexity, and that's the one that took 15 seconds.
The case is simple, it's $$$K= \sqrt{2Q}$$$ and $$$a=$$$
1 2 3 .. K 1 ... N%K.Then the queries are all possible pairs $$$1\le l \lt r \le K$$$.
This makes the minimum frequency $$$O(\sqrt{N})$$$ for every query and all occurences of
vhave at least one valid subarray, so it will run the binary search for each of the $$$O(\sqrt{N})$$$ occurences.I just think the test cases weren't adapted to this kind of solutions that use this minimum frequency + memoization heuristic.
as a tester, the problems are awesome and the Mkaw3 problem is the best
As a coach, thank you (:
As a tester, the problems were quality.
As a tester, it was an honor to be a tester. Really nice problemset, huge thanks to the setters