Helvetic Coding Contest 2024 — Online Mirror
Difference between en14 and en15, changed 912 character(s)
Hello Codeforces! ↵

Back from the dead, we'd like to invite you to the [online mirror](https://codeforces.com/contest/1970) of the Helvetic Coding Contest, Switzerland open championship! You can find past mirror from [2019](https://codeforces.com/contest/1184), [2018](https://codeforces.com/contest/958), [2017](https://codeforces.com/contest/802), and [2016](https://codeforces.com/contest/690).↵

The [Helvetic Coding Contest](https://polympiads.ch/HC2/) used to be held yearly at [EPFL](https://www.epfl.ch/en/). This year, the [Polympiads](https://polympiads.ch) association is bringing it back alive! The contest itself took place on April the 13th, but the online mirror is scheduled on Saturday, [4th of May, 09:05 Swiss time](https://www.timeanddate.com/worldclock/fixedtime.html?day=4&month=5&year=2024&hour=10&min=5&sec=0&p1=166). The duration is 4:30.↵

Rules:↵

- you can participate in teams or individually with a single computer (1-3 people),↵

- standard ACM-ICPC rules (no hacking),↵

- the contest is not rated,↵

- if you have participated in the onsite contest, please do not participate in the mirror.↵

Contrary to what the mirror's date might lead you to believe, this year's theme is Harry Potter. It features 7 series of 3 related tasks with increasing difficulty (easy/medium/hard). Note that we do not guarantee that all problems are solvable using python. ↵

Thanks a lot to:↵

- [user:Petr,2024-04-28], [user:Charbel,2024-04-28], [user:ScarletS,2023-11-28], [user:3EVEHAR_KOAVA,2024-04-28], [user:AdrienVannson,2024-04-28], [user:bjornargh,2024-04-28], and [user:zehnsechs,2024-04-28] for setting and/or coordinating the problemsetting,↵

- [user:matrix,2024-04-28] for preparing the technical setup of the contest↵

- [user:paula,2024-04-28], [user:Macdu,2024-04-28], [user:McLovinn,2024-04-28] as well as problemsetters for testing the contest,↵

- All of Polympiads committee and on the day staff for making the contest possible,↵

- [user:MikeMirzayanov,2024-04-28] for creating the amazing Codeforces and Polygon platforms! ↵

![ ](/predownloaded/a6/09/a6098a9a86e0c293fc1cb6e4d939fff92d048b97.jpg)↵

**UPDATE**: [Editorial](https://codeforces.com/blog/entry/129149) is out. Thanks all for participating!


**UPDATE 2**: Congratulations to the winners who solved all 21 subtasks:↵

1. [thinking](https://codeforces.com/team/158975): [user:Ormlis,2024-05-04], [user:Mangooste,2024-05-04]↵
2. [Captain take me!](https://codeforces.com/team/154156): [user:crazy_sea,2024-05-04], [user:A_zjzj,2024-05-04], [user:275307894a,2024-05-04]↵
3. [japan406364961](https://codeforces.com/team/157963): [user:Nyaan,2024-05-04], [user:kotatsugame,2024-05-04], [user:risujiroh,2024-05-04]↵
4. [Qingyu Fan Club](https://codeforces.com/team/158956): [user:xinyoudui,2024-05-04], [user:GapGapGap,2024-05-04], [user:InfiniteStarlight,2024-05-04]↵
5. [Idea Generators Club](https://codeforces.com/team/158874): [user:tedi_2.0,2024-05-04], [user:Denisov,2024-05-04], [user:Valera_Grinenko,2024-05-04]↵
6. [user:244mhq,2024-05-04]↵
7. [user:jiangly,2024-05-04]↵

We hope you enjoyed the problems, please share your thoughts in comments!

History

 
 
 
 
Revisions
 
 
  Rev. Lang. By When Δ Comment
en19 English Petr 2024-05-05 09:49:39 9
en18 English Petr 2024-05-04 15:50:45 4 Tiny change: 'wnload/25388/contest-4' -> 'wnload/25392/contest-4'
en17 English Petr 2024-05-04 15:23:58 121
en16 English Petr 2024-05-04 15:00:46 562
en15 English Petr 2024-05-04 14:50:07 912 Tiny change: 'ubtasks:\n1. think' -> 'ubtasks:\n\n1. think'
en14 English Petr 2024-05-04 14:43:12 107
en13 English Cauchico 2024-04-28 17:48:26 0 (published)
en12 English Cauchico 2024-04-28 17:47:55 23 Tiny change: 'ividually (1-3 peop' -> 'ividually with a single computer (1-3 peop'
en11 English Cauchico 2024-04-28 17:45:00 7 Tiny change: 'the mirror might lea' -> 'the mirror's date might lea'
en10 English Cauchico 2024-04-28 17:44:13 76
en9 English ScarletS 2024-04-28 17:43:29 0 (saved to drafts)
en8 English ScarletS 2024-04-28 17:42:45 6 Tiny change: 'arletS,2024-04-28], [use' -> 'arletS,2023-11-28], [use' (published)
en7 English Cauchico 2024-04-28 16:34:28 2 Tiny change: 'h of May, 90:05 Swiss ' -> 'h of May, 09:05 Swiss '
en6 English Cauchico 2024-04-28 16:33:34 93
en5 English Cauchico 2024-04-28 16:30:30 22
en4 English Cauchico 2024-04-28 16:30:03 10
en3 English Cauchico 2024-04-28 16:28:50 4
en2 English Cauchico 2024-04-28 16:28:40 10
en1 English Cauchico 2024-04-28 16:28:14 2016 Initial revision (saved to drafts)