Codeforces Round #675 (Div. 2) will take place on the 4th of October at 16:05 UTC.
Please, join by the link https://codeforces.com/contests/1422

Bubble Cup 13 - Finals (Online Mirror, Unrated, ICPC Rules, Div. 1, Div. 2) will take place on the 5th of October at 13:05 UTC.
Please, join by the link https://codeforces.com/contests/1423,1424

Codeforces Round #675 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1422

Bubble Cup 13 - Finals (Online Mirror, Unrated, ICPC Rules, Div. 1, Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1423,1424

Codeforces infrastructure is temporarily unavailable, we are working on fixing it.

🔥Codeforces Global Round 11🔥 starts on the 10th of October at 14:50 UTC.

It is the eleventh round of Codeforces Global Rounds supported by XTX Markets.

The round is open and rated for everybody!

The prizes for this round:

👕30 best participants get a t-shirt.

👕20 t-shirts are randomly distributed among those with ranks between 31 and 500, inclusive.

We will be glad to see you among the participants!

Please, join by the link https://codeforces.com/contests/1427

🛠Testing Round #17 (unrated) will take place 20 minutes before the start of the Codeforces Global Round 11. Please help us test the system under load!

Educational Codeforces Round 96 (rated for Div. 2) starts on the 11th of October at 09:05 UTC.
Please, join by the link https://codeforces.com/contests/1430

🔥Codeforces Global Round 11 (Rated for Everybody, 50 Prize T-Shirts!)🔥 starts in ~2 hours.

Please, join by the link https://codeforces.com/contests/1427

Educational Codeforces Round 96 (rated for Div. 2) starts in ~2 hours.
Please, join by the link https://codeforces.com/contests/1430

💥Codeforces Raif Round 1 (Div. 1 + Div. 2)💥 starts on 17th of October at 13:05 UTC.

It will be combined rated round for both divisions.

🏅Thanks to Raiffeisenbank, winners will get awesome swag:

1st-3rd place = Bluetooth speaker;
4th-10th place = Bumbag;
11th-20th place = Power Bank.

🎲 Random 50 participants outside of top-20, who solved at least one problem will receive: Thermos Mugs, Raiffeisenbank t-shirt.

We will be glad to see you among the participants!

Please, join by the link https://codeforces.com/contests/1428

💥Codeforces Raif Round 1 (Div. 1 + Div. 2)💥 starts in ~2 hours. Rated for everybody, prizes!

Please, join by the link https://codeforces.com/contests/1428?locale=en

Codeforces Round #676 (Div. 2) will take place on the 18th of October at 09:05 UTC.
Please, join by the link https://codeforces.com/contests/1421

Codeforces Round #676 (Div. 2) starts in ~30 minutes. Please, join by the link https://codeforces.com/contests/1421

Codeforces Round #677 (Div. 3) will take place on the 20th of October at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1433

Codeforces Round #677 (Div. 3) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1433

Codeforces Round #678 (Div. 2) will take place on the 24th of October at 14:05 UTC.
Please, join by the link https://codeforces.com/contests/1436

Codeforces Round #679 (Div. 1, Div. 2, based on Technocup 2021 Elimination Round 1) will take place on the 25th of October at 11:05 UTC

Please, join by this link https://codeforces.com/contests/1434,1435

Technocup is a major olympiad for Russian-speaking high-school students. So if you fit into this category, please register at https://technocup.mail.ru/ and take part in the official Elimination Round.

Codeforces Round #678 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1436

Codeforces Round #679 (Div. 1, Div. 2, based on Technocup 2021 Elimination Round 1) starts in ~2 hours.

Please, join by this link https://codeforces.com/contests/1434,1435

Technocup is a major olympiad for Russian-speaking high-school students. So if you fit into this category, please register at https://technocup.mail.ru/ and take part in the official Elimination Round.

Educational Codeforces Round 97 (rated for Div. 2) starts on the 27th of October at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1437