Update [1.05.2026] I'm restarting my weekly group classes! There will be live Zoom classes at 12:00 UTC = 14:00 CEST, Discord server, and recordings. The classes should be suitable for everybody with rating from 800 up to 2300.
Every week, you get a list of homework problems of two types:
- Optional problems, mostly from big platforms like Codeforces, with existing English editorials.
- Problems to be discussed next lesson, including some without English editorials, e.g. from Polish competitions. (Plus I might cover some related problems or follow-ups.)
It's a mix of old and recent problems, and a mix of nice (beautiful) and standard/educational problems. Some weeks are focused on one topic, but the default is random problem-solving rather than structured lectures.
Easy/div2 group: 1 hour of Leetcode/interview problems, then 1 hour of CF/CP problems of difficulty 1400-2000. Mondays 14:00-16:00 CEST. First class: 4.05
Hard/div1 group: 90+ minutes of CF/CP problems of difficulty 2100-3000. Tuesdays 14:00-15:30 CEST. First class: 5.05
You can attend both groups (but please be active live only in the one at your level). Classes are weekly. Formally, I guarantee 4 classes per month in each group, possibly including one shorter prerecorded class when I'm not available (sick or trip).
Price I: 100€ per month (or 9000 INR for India, 20% off). You can attend Zoom classes live and can ask questions. You also get access to Discord server and recordings. Payment link: https://buy.stripe.com/eVq7sNbYddgJ7yMdUx6wE0i
Price II: 75€ per month (or 7000 INR for India). You get access to Discord server and recordings. https://buy.stripe.com/4gM7sN0fv90t3iw4jX6wE0j
Use the code START to get 25% off the first month, valid until Monday 4.05. You get 1 week free if you attended the classes last year. Cheers, see you there!
If you're interested in more personalized training or Summer classes in small groups, please fill this form https://forms.gle/ArMcue7rhwhjmKqRA
hi, my b-tech in CSE fess is around eur83.33(6000inr) per month. i am from india. i get to attend classes every day (air conditioned). labs for every subject (computer network lab, compiler lab, operating systems lab, unix lab etc). 100eur is too much for me
6000 inr for a indian college is very rare. I think you have applied any caste/income certificate.
bro, state govt college. and i am from general category and have family income> 12lpa, for you info i got 98%in jee mains. haven't you heard about jadavpur university, assam university, jamia millia islamia, iet lucknow etc ( and i am not from any of these university/ colleges).
Arguably, you're overpaying for your classes. University students in Poland pay nothing.
Btw. I understand that there exists free education, and that prices around the world are different. Though I don't think that your example shows an alternative to what I offer. If a LGM with teaching experience starts doing classes similar to mine but way cheaper, then it will indeed be a better deal.
cuz poland is, ofc, the model country
nah brother/sir 100 euro is fine but make sure international transaction convert to native currency as if i do euro transaction forex and other will come in play but 100 euro for such courses is market standard in india for good one one can buy 20-30 euro course of dsa here buts that dont fine skill but the 100 euro are charged for year not month
Sounds like a good opportunity, though class times are hard to make for me at 8:30 AM on a Monday US time.
Hi sir, It'd be more easier to convince our parents for a one time purchase instead of monthly subscription. It's slightly expensive(although thanks for 20% discount)
Hello! Is there any way to pay just once? (For example 400$ for all period or something like this) ?
I want to wait 1+ months to figure out all the details about the classes. I don't want you to pay for a few months and then change some rules after a month (e.g. time of a lesson). Afterwards, I will accept payments for longer periods.
Hi, sounds cool! When will the LeetCode classes be?
Those will start in second half of August, hopefully.
How many people have registered yet? for all the easy hard and very hard category
7 per group (easy and hard) + some for access-only tier. So far only 3 people said they're interested in the very hard (similar for Leetcode classes).
That's criminal. I was doing a similar thing in 2020-2021 in Russian and had more students. I thought you would have upwards of a hundred interested people. The price is very reasonable, I would even say low for a teacher of your calibre.
but having just 4 classes (with that high cost) will always have attraction of very less people I might consider joining if it had more content. I know many would be against me but this is the true point for not many people not enrolling I feel.
In my experience, private tuitions in India cost about the same (although they were 1-on-1). I used to take French tuitions that were ₹5000 per month for just one class a week, so I find Errichto's pricing quite reasonable for Indian students.
It's all relative. I certainly wouldn't bother doing these classes for cheaper than this. Even if I could magically get any number of students, the time spent on just answering questions in Discord would make it not worth it for me (compared to doing any other job, including 1-on-1 classes).
There's now 10 average per group + many students for non-live access. We're getting somewhere.
Also, why are most of your CF comments made under my blogs?
Please make something for coders rated from 800 to 1000 — My dumb brain is not even solving 800 problems of codeforces if you have time please guide
So, I'm assuming recordings will be inaccessible after a month since it's a subscription based model, right? Also, if I subscribe to the course a bit later, will the past recordings and homework problem-sets be available or no?
I haven't decided yet but I think it makes sense to keep the previous 2-3 months as recordings.
Sounds a Very good opportunity,I really want to join it, but the fee is too high for me I can not afford it. Sad, cant join it!
Sounds a Very good opportunity,I really want to join it, but the fee is too high for me I can not afford it. Sad, cant join it!
Is there any way to cancel the subscription after 1,2 months?(In case if it will not suit for me)
Yes, there's a Stripe (payment processor) page where you can manage your subscription: cancel, change tier, change card, see date of next payment.
Hey Errichto, We just have to make the payment na nothing more.What is the procedure to join the this.
Hello! I received the Discord invitation for Errichto CP School, but it seems my access hasn’t been approved yet — I still can’t enter the server. Could someone please check or approve my request? Thank you very much for your help, and sorry for the trouble!
PS: If anyone can contact him, please help us!
Same here too, please let me know if you need clarifications on the email for payment that was used!
How much time does it take to for access to be approved as it is approximately 24 hours and it still under review?
It might be helpful. But it's such a pity that it's too late in NZ.
Hello! I still can’t enter the server. Could someone please check or approve my request? Thank you very much for your help, and sorry for the trouble! Errichto
[user:Errichto]Can you add an option for UPI Payment as well?
Is this still available?
can I still enroll in this?
will there be videos/livestreams again ?
I tried contacting you through multiple platforms for Hard/Very hard group
Hi, is this opportunity still available for the easy group even if it's already started?
Where is the link for payment for May 2026 and is the price still same?? -> 50€ per month (or 4000 INR for India) I am asking because of confusion , because it was the same price before and in the blog it is written -> "Price and link [2026]: 100€ per month, payment link will be posted here on Sunday, 26.04.2024."
Any updates and where/how to register ?
did u find something??
Nope
The first Easy class starts in 15 hours, you can still join!
Please note that the time links in the blog were incorrect. The text was correct (12:00 UTC = 14:00 CEST start time). I've corrected the links now.
Hi, I am seeing this 10 months later sadly, is it too late to join now ?