Hey!

My friend Daniel and I (former USA Math Olympiad participants) are hosting a live math competition on Monday Feb 5 at 7:30 EST (4:30 PST). The level of problem will be similar to the MATHCOUNTS competition (here's an example).

Would love to see signups, feel free to sign up directly on the site or through our Google Form. Also, would love to hear suggestions on groups of people whom you think this would be the right difficulty for (i.e. who should I share this with!)

Hi!

Wanted to share that my friend Daniel and I (both prolific codeforcers and Math competition nerds) are hosting an online free training program in the last week before the AIME (American Invitational Math Exam)!

We plan to send you AIME problems to your email on a daily basis (as frequently as you solve them!) and will make ourselves available to give you hints when you are stuck. We’ll adjust the difficulty of the questions in order to match the appropriate level.

If interested, sign up at https://forms.gle/1i6JHeZh4Qu3Fs7Y6 We will respond ASAP to let you know if we’re able to accommodate you.

Hope we can help you or anyone you know prepare for the AIME in a week!

Hey I've been working on this online multiplayer math game app and I thought I'd share to see if y'all like it! You can compete against others to get the highest ELO rating in different math categories. Would love all suggestions of question types and/or features!

https://www.quickmaths.io

Try to beat my high scores :)

TLDR: Try out this guess-the-song game! https://www.partyy.life/

Hi, My friend and I have been working on this guess-the-song website for a while now, and we'd really appreciate it if you could try it out and share any feedback on design, gameplay, difficulty, suggestions, or anything! This isn't really related to competitive programming except that this game's addictiveness is $$$O(n^2)$$$!!

I know the global rounds tend to have good problems, but other than those, which rounds tend to have higher quality problems? Sponsored rounds (which ones)? rounds with tons of authors? Are there any specific authors who always have incredible rounds? anyone have specific round recommendations?

Hey all,

I spent some time writing a textbook on how to efficiently convert between different bases, and thought it may be useful to those of you who are learning this for the first time.

Link: https://drive.google.com/file/d/12CeDNZO_trww-ZtGWMdSUCrhN8kcbi2U/view

Hi, I'm a high school senior, and I've noticed that Codeforces is a really good way to get people passionate about competitive programming. There is something about the thrill of working and competing to improve one's rating in an online community, that helps motivate all of us to improve.

I'm wondering if, theoretically, it could be possible to recreate this experience in the high-school classroom. Currently, students see schoolwork as a burden; one funny quote I've heard is to "not let school get in the way of learning". If somehow students could learn subjects such as math, physics, or anything else in an online community through training for competitions and rating, perhaps this could make learning more fun and exciting?

Obviously I think it would be a bad idea to grade based on rating; that would only create unhealthy competition. Perhaps something such as this could replace traditional homework? I'm curious as to what you all think.

Do most of you guys use templates for coding things such as Segment Trees that are hard to code? If so, did you write them yourself or are there any good implementations or templates available online? (Is this even allowed?)

Also, what other data structures are useful to have templates for?

Topcoder SRM 647 will be held tomorrow (Saturday) at 12:00 Noon EST; details here. Discuss the problems here after the contest!

Topcoder SRM 645 will be held tomorrow (Monday) at 11:00 AM EST (see below for your time zone). Official announcement here.

So, see here for the time of Monday's round. This thread can be used for pre/post-contest discussion.