🔥ICPC Challenge 2020 🔥 starts on 27th of June at 11:00 UTC.

The contest is unrated.

It will contain one marathon-like problem with an inaccurate solution.

The top-scoring participants will receive great prizes, including Huawei P40 Pro, Matepad Pro, Watch GT 2E.

We will be glad to see you among the participants!

Please, join by the link https://codeforces.com/contests/1377?locale=en

🔥ICPC Challenge 2020🔥 (unrated, prizes) starts in ~2 hours.
Please, join by the link https://codeforces.com/contests/1377?locale=en

Codeforces Round #653 (Div. 3) starts on 28th of June at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1374

Codeforces Round #653 (Div. 3) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1374

Please, try EDU on Codeforces! New educational section with videos, subtitles, texts and problems. https://codeforces.com/blog/entry/79530

Codeforces Round #654 (Div. 2) starts on 1st of July at 13:35 UTC.
Please, join by the link https://codeforces.com/contests/1371

Codeforces Round #654 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1371

🔥Codeforces Global Round 9🔥 starts on 4th of July at 14:35 UTC.

It is the ninth 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/1375

🔥Codeforces Global Round 9 (Rated for Everybody, 50 Prize T-Shirts!)🔥 starts in ~2 hours.

Please, join by the link https://codeforces.com/contests/1375

Codeforces Round #655 (Div. 2) starts on 11th of July at 15:05 UTC.
Please, join by the link https://codeforces.com/contests/1372

Codeforces Round #655 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1372

Educational Codeforces Round 91 (rated for Div.2) starts on 12th of July at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1380

Educational Codeforces Round 91 (rated for Div.2) starts in ~2 hours.
Please, join by the link https://codeforces.com/contests/1380

For unexpected reasons Codeforces is down. Sorry about it.

New activity in the EDU section!
Pavel Mavrin explains in detail how to build a simple segment tree (without mass modifications), and how to perform basic operations on it. Time to learn!

New lesson awaits you at this link https://codeforces.com/edu/course/2/lesson/4

Codeforces Round #656 (Div. 3) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1385?locale=en

Sorry about the previous message. Of course Codeforces Round #656 (Div. 3) will take place on the 17th of July at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1385?locale=en

Codeforces Round #656 (Div. 3) starts in ~1 hour. Please, join by the link https://codeforces.com/contests/1385?locale=en

Codeforces Round #657 (Div. 2) starts on 19th of July at 09:00 UTC.
Please, join by the link https://codeforces.com/contests/1379

Codeforces Round #657 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1379