By Lain, history, 41 hour(s) ago, In English

The round is starting in around half an hour. Let's discuss the approaches here after it's done.

Good luck!

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By Mamun, history, 13 hours ago, In English

I have already solved 500+ problems in codeforces , 100 problem in another judge and participated 72 rated contest. Even I didn't become green yet. I can't be able to improve my rating .How can I improve my coding skill as well as rating also? Can You suggest me which strategy I have to follow to choose problem-sets for practicing. Thanks In Advance..

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By ch_egor, 2 weeks ago, translation, In English

Thanks for the participation!

1492A - Three swimmers was authored by meshanya and prepared by ch_egor

1492B - Card Deck was authored by Noam527 and prepared by ch_egor, adedalic

1492C - Maximum width was authored and prepared by Jatana

1492D - Genius's Gambit was authored by voidmax and prepared by rip

1492E - Almost Fault-Tolerant Database was authored by wrg0ababd and prepared by Sehnsucht

Tutorial is loading...
Tutorial is loading...
Tutorial is loading...
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By luisrdevy, history, 42 hours ago, In English

Hi!

I have made a green-navi dark theme for Codeforces, solving problems in the night it's a nightmare with the light theme by default.

Installation:
1. Install Tampermonkey extension.
2. Install Navi Dark theme.

Please consider star on project repository..
Contributions open :)

Navi dark Theme

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By pani.natalia, 41 hour(s) ago, translation, In English

As I wrote before only 1622 profiles on Codeforces have in their history a rating more than 2400 (February 2021). How many days are between the contest where a user became red and his first contests?

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By Ashishgup, history, 3 hours ago, In English

We invite you to participate in CodeChef’s CodeChef’s February Lunchtime on 27th February from 7:30 PM — 10:30 PM IST.

There will be 7 problems in Division 3 and 6 problems in Division 2/1.

CodeChef is happy to announce Codenation Innovation Labs (CNIL) as a recruiter for February Lunchtime 2021. CNIL is hiring programmers for the Software Development Engineer role and its Junior Trilogy University (Intern Programme). Programmers from India and across the globe are invited by Codenation Innovation Labs to apply for opportunities at its organization.

Joining us on the problem setting panel are:

Problem Submission: If you have original problem ideas, and you’re interested in them being used in CodeChef's contests, you can share them here.

Prizes: Top 10 Indian and top 10 Global school students from ranklist will receive certificates and CodeChef laddus, with which they can claim cool CodeChef goodies. Know more here.

The video editorials of the problems will be available on our YouTube Channel as soon as the contest ends. Subscribe to get notifications about our new editorials.

Admin Note: Special thanks to Um_nik for his help and for suggesting better solutions for the harder problems.

Good luck and have fun!

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By chokudai, history, 6 hours ago, In English

We will hold Caddi Programming Contest 2021(AtCoder Beginner Contest 193).

The point values will be 100-200-300-400-500-600.

We are looking forward to your participation!

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By maroonrk, history, 4 hours ago, In English

XXI Opencup GP of Tokyo will be held tomorrow.

I prepared the problems with the help from hos.lyric.

I'll upload the editorial after the contest ends, and also I'll upload the contest to the GYM.

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By Peregrine_Falcon, history, 44 hours ago, In English

Hello, Codeforces community!
I'm glad to invite you to Criterion 2021 Round 10 which will be held on February 26, 2021 at 16:00 PM +0600 and will run for 2 hours 30 minutes.

The contest will take place at Toph.co

This contest is rated for all participants. You can register for the contest here.

Problems of this contest were prepared and tested by shefin.cse16, Hasinur_, TarifEzaz and me.

Thanks to TarifEzaz for his unconditional support and hjr265 for the best contest programming platform in Bangladesh.

We're inviting you all to participate in this contest. Hope you will enjoy the problem set.
There will be an editorial for this contest shortly after the round ends.
Feel free to share your experience with previous Criterion Rounds!

Contest Link: Criterion 2021 Round 10

Happy Coding!

Update: Editorials are out and problems are open for submissions!

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By AleksanderBalobanov, history, 4 days ago, translation, In English

Hi everyone! I would like to share a contest from problems I suggested in some programming school. These problems are by my own and some by Mosyagin. Is starts on this Wednesday at 18:00 Moscow time (see your timezone https://www.timeanddate.com/worldclock/fixedtime.html?day=24&month=2&year=2021&hour=18&min=0&sec=0&p1=166). You will be given 8-9 problems. I think they are educational a bit(but may be not all). I would be glad if you will participate and give me some feedback. Don't be too strict anyway it's one of my first such experience though I always wanted to make a contest. You can find contest in gym with name Kaliningrad Krosh Contest 1. It's duration 3 hours, statements will be on Russian and English.

Tutorial of 8 of 10 problems(except E and J): https://drive.google.com/file/d/1i_H_OFlPyx4uAtzD4r6PxRxI2bEXs76V/view?usp=sharing

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Announcement of Krosh Kaliningrad Contest 1
 
 
 
 
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