Open Cup has very high quality problems. I made a list for all the contests containing the standings, sources, upsolving links, statements and discuss blog in codeforces. Some materials and links of old opencup contests are missing, maybe snarknews could help to fill these entries.
I will update the list when new opencup stages published.
Note: most of the upsolving links need the logins for yandex.contest or opentrains.
XXI Open Cup named after E.V. Pankratiev
XX Open Cup named after E.V. Pankratiev
XIX Open Cup named after E.V. Pankratiev
XVIII Open Cup named after E.V. Pankratiev
XVII Open Cup named after E.V. Pankratiev
XVI Open Cup named after E.V. Pankratiev
XV Open Cup named after E.V. Pankratiev
XIV Open Cup named after E.V. Pankratiev
XIII Open Cup named after E.V. Pankratiev
| # | Contest | Upsolving | Materials |
|---|---|---|---|
| Stage 1 | Grand Prix of Saratov Petrozavodsk Winter 2013. Day 4: Saratov SU Contest | gym opentrain | statement discuss |
| Stage 1b | Grand Prix of Europe Izhevsk Mirror of Petrozavodsk Winter 2013. Day 9 | opentrain | statement [discuss] |
| Stage 2 | Grand Prix of Ukraine Kharkiv Winter Programming School 2013. Day 1: Akai Contest | opentrain | statement [discuss] |
| Stage 3 | Grand Prix of Kharkiv Kharkiv Winter Programming School 2013. Day 4: Vitaly Nespirny Contest | opentrain | statement discuss |
| Stage 4 | Grand Prix of ICL ICL 2013 | opentrain | statement discuss |
| Stage 5 | Grand Prix of America UCIPC 2013 | kattis opentrain | statement discuss |
| Stage 6 | Grand Prix of SPb XXXV St. Petersburg State University Championship | opentrain | statement discuss |
| Stage 7 | Grand Prix of Azov Sea 2013 Southern Russia Open Championship | opentrain | statement discuss |
| Stage 8 | Grand Prix of South Caucasus Japan Alumni Group Spring Contest 2013 Vekua Cup 2013 | atcoder opentrain | statement discuss |
XII Open Cup named after E.V. Pankratiev
XI Open Cup named after E.V. Pankratiev
| # | Contest | Upsolving | Materials |
|---|---|---|---|
| Stage 1 | Grand Prix of Saratov Petrozavodsk Winter 2012. Day 6: Saratov SU Contest | gym | statement discuss |
| Stage 2 | Grand Prix of Ukraine Kharkiv Winter Programming School 2012. Day 1: Akai Contest | e-olymp | statement discuss |
| Stage 3 | Grand Prix of Azov Sea 2012 Southern Russia Open Championship | opentrain | statement discuss |
| Stage 4 | Grand Prix of ICL ICL 2012 | gym | statement discuss |
| Stage 5 | Grand Prix of Ural Ural Championship 2012 Vekua Cup 2012 | opentrain timus | statement discuss |
| Stage 6 | Grand Prix of Moscow | statement discuss | |
| Stage 7 | Grand Prix of SPb XXXII St. Petersburg State University Championship | statement discuss | |
| Stage 8 | Grand Prix of America UCIPC 2012 | baekjoon kattis | statement discuss |
X Open Cup named after E.V. Pankratiev
IX Open Cup named after E.V. Pankratiev
VIII Open Cup named after E.V. Pankratiev
| # | Contest | Upsolving | Materials |
|---|---|---|---|
| Stage 1 | Grand Prix of Ukraine 2010 All-Ukrainian Collegiate Programming Contest | baekjoon e-olymp | statement discuss |
| Stage 2 | Grand Prix of Yekaterinburg Petrozavodsk Summer 2010. Day 3: Ural SU Contest | opentrain timus | statement discuss |
| Stage 3 | Grand Prix of Udmurtia Izhevsk Mirror of Petrozavodsk Summer 2010. Day 9: NPO Computer Cup Stage 2 | opentrain | statement discuss |
| Stage 4 | Grand Prix of SP XXVII St. Petersburg State University Championship | statement discuss | |
| Stage 5 | Grand Prix of Siberia XI All-Siberian Programming Contest. Onsite | opentrain | statement discuss |
| Stage 6 | Grand Prix of Europe | opentrain | statement discuss |
| Stage 7 | Grand Prix of Peterhof XXVIII St. Petersburg State University Championship | statement discuss |
VII Open Cup named after E.V. Pankratiev
| # | Contest | Upsolving | Materials |
|---|---|---|---|
| Stage 1 | Grand Prix of Kharkiv Kharkiv Winter Programming School 2010. Day 1: Vitaly Nespirny + Anton Lunev Contest | e-olymp opentrain | statement |
| Stage 2 | Grand Prix of Saratov Petrozavodsk Winter 2010. Day 6: Saratov SU Contest | opentrain | statement |
| Stage 3 | Grand Prix of Baltic XXVI St. Petersburg State University Championship | statement | |
| Stage 4 | Grand Prix of Azov Sea 2010 Southern Russia Open Championship | e-olymp | statement |
| Stage 5 | Grand Prix of Ural Ural Championship 2010 | opentrain timus | statement |
| Stage 6 | Grand Prix of South Caucasus Vekua Cup 2010 | [statement] | |
| Stage 7 | Grand Prix of Belarus | [statement] | |
| Onsite | opentrain | statement |
VI Open Cup named after E.V. Pankratiev
| # | Contest | Upsolving | Materials |
|---|---|---|---|
| Stage 1 | Grand Prix of Ukraine 2009 All-Ukrainian Collegiate Programming Contest | opentrain | statement |
| Stage 2 | Grand Prix of Udmurtia Izhevsk Mirror of Petrozavodsk Summer 2009. Day 9: NPO Computer Cup | opentrain | statement |
| Stage 3 | Grand Prix of South Caucasus Vekua Cup 2009 | opentrain | statement |
| Stage 4 | Grand Prix of SPb XXIV St. Petersburg State University Championship | statement | |
| Stage 5 | Grand Prix of Yekaterinburg Open Ural SU Championship 2009 | timus | statement |
| Stage 6 | Grand Prix of Peterhof XXV St. Petersburg State University Championship | statement | |
| Stage 7 | Grand Prix of Siberia X All-Siberian Programming Contest. Onsite | opentrain | statement |
V Open Cup named after E.V. Pankratiev
| # | Contest | Upsolving | Materials |
|---|---|---|---|
| Stage 1 | Grand Prix of Ukraine 2008 All-Ukrainian Collegiate Programming Contest | e-olymp | statement |
| Stage 2 | Grand Prix of Belarus | statement | |
| Stage 3 | Grand Prix of Spb XXI St. Petersburg State University Championship | statement | |
| Stage 4 | Grand Prix of Siberia IX All-Siberian Programming Contest. Onsite | opentrain | statement |
| Stage 5 | Grand Prix of Peterhof XXII St. Petersburg State University Championship | statement | |
| Stage 6 | Grand Prix of Karelia Petrozavodsk Winter 2009. Day 4: Warsaw U Contest | statement | |
| Stage 7 | Northern Grand Prix Petrozavodsk Winter 2009. Day 6: Andrew Stankevich Contest 34 | gym | statement |
| Stage 8 | Grand Prix of Two Capitals XXIII St. Petersburg State University Championship | statement |
What is the level of these contests? I generally see only reds commenting on posts about the Open Cups, is it worth solving for a team with yellow and purples?
Yes. You will typically solve 4-5 problems
There are div 2 contests for low level teams which are not contained in my list. Maybe I will find the links too later.
Are there any obstacles against making Opencup easily open for everybody?
One possible obstacle is that such opening may hurt people whose rating <2600 :(
0_0
You da real MVP
2018-2019 GP Daejeon 2019-2020 GP Moscow
We are planning to migrate recent GP problems to Baekjoon OJ, just like our Petrozavodsk archive. I don't expect it to be done soon, but stay tuned for that future.
I always find it hard to search for the OpenCup's discussion blogs by using the search engine of Codeforces, even if I type the blog's titles correctly. This blog will definitely help those guys who have difficulty searching for the blogs just like me. Thank you for your effort!
Yes, that's also the reason why I made this list.
GP of Xiaomi：https://ac.nowcoder.com/acm/contest/9328
Is the statement of X Open Cup GP of Siberia damaged? I can't view it on my PC.
The English version of the statement on opentrains is also not working. You can find the Russian version here.
Everything is in Russian.
A machine translation software/website may be for you. (Google Translate extension, or just the "Translate to english" option in some browsers(Chrome, etc.))
What about of updating this list ?
I'm a Chinese, sorry to my poor English at first.
zimpha didn't update the list, I'd like to update it below.
XXII Open Cup:
At last thanks to all task authors, Codeforces Gym authors and QOJ authors.
If you find some mistakes, you can reply this comment.
UPD (2023.3.23) Add GP of BSUIR's Link.
Amazing! This is really useful given that opencup.ru is down currently. Thanks for updating!
It seems that the official links for GP of EDG and GP of Southern Europe is not correct. Could you fix them?
Good job! Here's a table including the original source of the contest
Moscow International Workshops 2021. Day 2, Div.A
Moscow International Workshops 2021. Day 1, Div.A+B
Petrozavodsk Winter 2022. Day 1, Kyoto U Contest 2
There is no codeforces gym contest for "The 2020 China Collegiate Programming Contest, Weihai". The link is wrong, so could you please add that contest?
I can open the contest link. And I can also find it by searching
2020 China Collegiatin https://codeforces.me/gyms.But if you compare the problems in this gym with the problems in the statement, they are different. That CF gym link redirects to some another contest. Particularly, I look for the L problem ("Light Version Of Famous Task") in CF.
They are the same problemset but with different names and problem orders. The problem you looking for is ABC Conjecture.
Oh, damn. Thanks!