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

Codeforces Round #660 (Div. 2) starts on the 30th of July at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1388

Codeforces Round #660 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1388

New in the EDU section!
The second part of the lesson from Pavel Mavrin about the segment tree was published. Hope it will be helpful, enjoy!

New lesson awaits you here https://codeforces.com/edu/course/2/lesson/5

Codeforces Round #661 (Div. 3) will take place on the 5th of August at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1399

Codeforces Round #661 (Div. 3) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1399

Codeforces Round #662 (Div. 2) starts on the 7th of August at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1393?locale=en

Codeforces Round #662 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1393?locale=en

Codeforces Round #663 (Div. 2) starts on the 9th of August at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1391

Codeforces Round #663 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1391

Codeforces Round #664 (Div. 1, Div. 2) starts on the 12th of August at 14:35 UTC.
Please, join by the link https://codeforces.com/contests/1394,1395

Codeforces Round #664 (Div. 1, Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/1394,1395