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Codeforces Official
21 Sept, 12:35
Codeforces Round 1122 (Div. 3) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/2266CodeforcesCodeforces Round 1122 (Div. 3) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
20 Sept, 14:35
Codeforces Round 1122 (Div. 3) will take place on 21 September 2026 at 14:35 UTC. Please, join by the link https://codeforces.com/contests/2266CodeforcesCodeforces Round 1122 (Div. 3) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
13 Sept, 15:05
Codeforces Round 1121 (Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/2264CodeforcesCodeforces Round 1121 (Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
12 Sept, 17:05
Codeforces Round 1121 (Div. 2) will take place 13 September 2026 at 17:05 UTC. Please note the unusual time of the round. Please, join by the link https://codeforces.com/contests/2264CodeforcesCodeforces Round 1121 (Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
12 Sept, 12:35
Codeforces Round 1120 (Div. 1, Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/2262,2263CodeforcesCodeforces Round 1120 - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
11 Sept, 14:35
Codeforces Round 1120 (Div. 1, Div. 2) will take place 12 September 2026 at 14:35 UTC. Please, join by the link https://codeforces.com/contests/2262,2263CodeforcesCodeforces Round 1120 - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
11 Sept, 10:01
Hi, Codeforces! 📱We'd like to share some exciting news: Telegram is back as our title sponsor! 🎉This means we can keep developing and maintaining the system and, most importantly, running rounds for a long time to come.A quick throwback to Codeforces history - our relationship with Pavel Durov and Telegram goes all the way back to 2010, when Pavel first put his faith in our community and supported Codeforces development. Since then, our cooperation has continued, and Telegram has supported Codeforces in different ways over the years. We're super excited to have Telegram as the title sponsor again.This support helps us with every round we run and gives us a chance to do new things, too.Thanks to Telegram's new support, we've already started moving our infrastructure to a more professional data center, making the system faster and more stable.CodeforcesTelegram Returns as Title Sponsor of Codeforces!Hi, Codeforces!Codeforces Official
8 Sept, 12:35
Educational Codeforces Round 194 (Rated for Div. 2) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/2260CodeforcesEducational Codeforces Round 194 (Rated for Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
7 Sept, 14:35
Educational Codeforces Round 194 (Rated for Div. 2) starts on 8 September 2026 at 14.35 UTC.The series of Educational Rounds continues thanks to the support of Neapolis University of Paphos (NUP), with scholarships provided by JetBrains.Planning to apply for the Computer Science and Artificial Intelligence (CSAI) program at Neapolis University Pafos?👉 Join JetBrains Youth Clubs: AI and Math to help you prepare.Please, join by the link https://codeforces.com/contests/2260CodeforcesEducational Codeforces Round 194 (Rated for Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
5 Sept, 12:35
Codeforces Round 1119 (Div. 3) starts in ~2 hours. Please, join by the link https://codeforces.com/contests/2259CodeforcesCodeforces Round 1119 (Div. 3) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
5 Sept, 08:27
Hey, having trouble sending out email announcements, so posting an extra one here.Codeforces Round 1119 (Div. 3) starts in ~6 hours. Please, join by this link https://codeforces.com/contests/2259CodeforcesCodeforces Round 1119 (Div. 3) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
4 Sept, 14:35
Codeforces Round 1119 (Div. 3) will take place on 5 September 2026 at 14:35 UTC. Please, join by the link https://codeforces.com/contests/2259CodeforcesCodeforces Round 1119 (Div. 3) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
2 Sept, 14:27
It is fixed now!Codeforces Official
2 Sept, 13:59
Due to an ongoing investigation into an incident in one of the server rooms, Codeforces and Polygon are temporarily unavailable. We are looking into the issue and working on a fix.Codeforces Official
29 Aug, 12:35
Codeforces Round 1118 (Div. 2) starts in ~2 hours. Please, join by this link https://codeforces.com/contests/2258CodeforcesCodeforces Round 1118 (Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
28 Aug, 14:35
Codeforces Round 1118 (Div. 2) will take place on 29 August 2026 at 14:35 UTC. Please, join by the link https://codeforces.com/contests/2258CodeforcesCodeforces Round 1118 (Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
20 Aug, 16:48
⚠️ Scheduled maintenanceCodeforces and Polygon may be unavailable due to technical maintenance:🕓 August 20, 16:00 UTC — August 21, 01:00 UTC.Codeforces Official
17 Aug, 12:35
Codeforces Round 1117 (Div. 2) starts in ~2 hours. Please, join by this link https://codeforces.com/contests/2257CodeforcesCodeforces Round 1117 (Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
16 Aug, 14:35
Codeforces Round 1117 (Div. 2) will take place on 17 August 2026 at 14:35 UTC. Please, join by the link https://codeforces.com/contests/2257CodeforcesCodeforces Round 1117 (Div. 2) - CodeforcesCodeforces. Programming competitions and contests, programming communityCodeforces Official
14 Aug, 09:01
⏰ Reminder: the event will start in 2 hoursICPC 2026 Online Challenge 1 powered by HuaweiStart: August 14, 2026 11:00 UTC Finish: August 28, 2026 10:59 UTCIt is an individual unrated competition.The top-scoring participants will receive great prizes, including travel and an invitation to the 50th Annual ICPC World Finals in a guest role, and cash prizes up to €12 000 for the first place.We will be glad to see you among the participants!Please, join by the link https://codeforces.com/contests/2251CodeforcesICPC 2026 Online Challenge 1 powered by Huawei - CodeforcesCodeforces. Programming competitions and contests, programming community
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