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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.
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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.
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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.
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Codeforces Round #658 (Div. 1, Div. 2) starts on 21st of July at 14:35 UTC.
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Codeforces Round #658 (Div. 1, Div. 2) starts in ~2 hours. Please, join by this link https://codeforces.com/contests/1381,1382

Baltic Olympiad in Informatics 2020, Day 1 ( IOI format, unofficial mirror contest, unrated) starts on 22nd of July at 11:05 UTC. Please, join by the link https://codeforces.com/contests/1386

Baltic Olympiad in Informatics 2020, Day 1 ( IOI format, unofficial mirror contest, unrated) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1386

Baltic Olympiad in Informatics 2020, Day 2 ( IOI format, unofficial mirror contest, unrated) starts on the 23rd of July at 11:05 UTC. Please, join by the link https://codeforces.com/contests/1387

Baltic Olympiad in Informatics 2020, Day 2 ( IOI format, unofficial mirror contest, unrated) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1387

Codeforces Round #659 (Div. 1, Div. 2) starts on the 24th of July at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1383,1384

Codeforces Round #659 (Div. 1, Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1383,1384

Educational Codeforces Round 92 (rated for Div.2) starts on 29th of July at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1389

Educational Codeforces Round 92 (rated for Div.2) starts in ~2 hours.
Please, join by the link https://codeforces.com/contests/1389