Errichto's blog

My Streams in Summer 2025
By Errichto, 15 months ago, In English

Hi, I'm back to streaming :)

In particular, I'm going live in 20 minutes. You can watch on Twitch or Youtube. The recording will remain available on YT.

June

July

Just like last year, I'm going to organize paid group classes around July-August, and a free IOI camp sponsored by Huawei. I will announce more details soon.

As an experiment, you can also book a 50€ Google Meet call with me https://calendly.com/errichto. For example, we can discuss your training strategy or just talk about life.

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15 months ago, hide # |
 
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i really need to talk with you about my life

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15 months ago, hide # |
 
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Will the ioi camp be organized before this years ioi?

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    15 months ago, hide # ^ |
     
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    Yes, I think that the dates will be 17-23.07.2025.

    I will put an announcement tomorrow.

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15 months ago, hide # |
 
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Omg Errichto is back ! Lets gooo

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15 months ago, hide # |
 
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will you marry me ?

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14 months ago, hide # |
 
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will there be more streams or is it over by tuesday?

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14 months ago, hide # |
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See you tomorrow (Saturday 12.07) at 11:00 CEST for CSES Introductory Problems. I will cover dp or geometry problems next.

Generally, I'm just solving problems on weekdays (ofc. not every day) and I will stick to the starting time of 15:00 CEST. I will try to make educational topic streams/lectures on weekends (timing might vary).

Also, here's a timestamp link to a solution summary for 2119D - Token Removing. People complained that the editorial isn't very clear — and I think that the visual explanation is useful here.

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    14 months ago, hide # ^ |
     
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    We discussed the first half of Introductory Problems (up to "Palindrome Reorder"). recording

    The next stream will be same time tomorrow, I will continue from "Gray Code" problem.

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14 months ago, hide # |
 
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I really enjoy your streams — they’ve helped me a lot in improving my thinking.

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14 months ago, hide # |
 
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I'm done with CSES Introductory Problems. I think that I explained everything in detail — which is why the two streams took 6 hours in total. All codes: https://github.com/Errichto/youtube/tree/master/CSES

What should I do next? Topics streams covering Usaco Guide Gold/Plat? CSES DP? Maybe the new problems in CSES Geometry (as I solved old ones in a stream a few years ago).

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    14 months ago, hide # ^ |
     
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    i think u should start with dp queastion and do a speed run i have some doubts on the DP queastion Mountain Range -> https://cses.fi/problemset/task/3314 Increasing Subsequence -> https://cses.fi/problemset/task/1145 i want to know you approch and ur thinking

    also i have a personal requeast to make can u make or do a small stream for graph queastion beginner-intermediate edition such that it is pices of cake for us to solve graph problems from cses queastion or any interveiw think you

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      14 months ago, hide # ^ |
       
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      Thanks for suggestions.

      But either it's a speedrun or it's a slower stream with detailed explanations. You can't have both ;p

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14 months ago, hide # |
 
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IOI 2025 day 1 stream: https://youtube.com/live/iRyOxI86UOs & https://www.twitch.tv/errichto

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14 months ago, hide # |
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I'm going live in 20 minutes to check out the problems from IOI day 2. It will be a short stream as I want to finish before peltorator starts his segment tree lecture stream.

Also, this is the last day with 12% off for my CF problem-solving classes with discount code IOI.

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14 months ago, hide # |
 
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I will cover CSES Dynamic Programming this weekend, first stream on Saturday (tomorrow 12:00 CEST).

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