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Algorithms, competitive programming, coding interviews. I make educational videos and coding live streams, always sharing my thought process.

My name is Kamil Dębowski (or Errichto) and I'm quite good at competitive programming. I'm a finalist of multiple big programming competitions like ICPC, Facebook Hacker Cup and Google Code Jam (even got 2nd place in 2018). I also organize competitions, which means inventing and preparing problems.

 My main channel is Errichto.

Tags

competitive programming
algorithms
coding interviews
codeforces
coding
programming

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Past live streams
Errichto Hard Algorithms
IOI 2025 day 2 problems
00:48:42
IOI 2025 day 2 problems

2,281 views

Streamed 4 months ago

Errichto Hard Algorithms
CF EDU 181 (Div. 2) | algorithms problem-solving
01:31:51
CF EDU 181 (Div. 2) | algorithms problem-solving

2,976 views

Streamed 4 months ago

Errichto Hard Algorithms
CF EDU 179 (Div. 2) A-E | algorithms problem-solving
02:16:09
CF EDU 179 (Div. 2) A-E | algorithms problem-solving

3,419 views

Streamed 5 months ago

Errichto Hard Algorithms
CF 1035 (Div. 2) C, E, F | algorithms problem-solving
02:02:43
CF 1035 (Div. 2) C, E, F | algorithms problem-solving

2,697 views

Streamed 5 months ago

Errichto Hard Algorithms
ABC 413 | algorithms problem-solving
03:00:04
ABC 413 | algorithms problem-solving

3,433 views

Streamed 5 months ago

Errichto Hard Algorithms
ARC 201 A-D | algorithms problem-solving
02:20:06
ARC 201 A-D | algorithms problem-solving

2,171 views

Streamed 5 months ago

Errichto Hard Algorithms
CF 1034 (Div. 3) | algorithms problem-solving
01:25:15
CF 1034 (Div. 3) | algorithms problem-solving

2,374 views

Streamed 5 months ago

Errichto Hard Algorithms
Token Removing & CF 1036 (Div. 1 + 2) | algo problem-solving
02:03:49
Token Removing & CF 1036 (Div. 1 + 2) | algo problem-solving

4,112 views

Streamed 5 months ago

Errichto Hard Algorithms
Codeforces algorithms problem-solving
01:31:53
Codeforces algorithms problem-solving

4,047 views

Streamed 5 months ago

Errichto Hard Algorithms
Codeforces algorithms problem-solving
02:14:47
Codeforces algorithms problem-solving

3,397 views

Streamed 5 months ago

Errichto Hard Algorithms
Codeforces algorithms problem-solving
01:44:09
Codeforces algorithms problem-solving

3,837 views

Streamed 5 months ago

Errichto Hard Algorithms
Codeforces algorithms problem-solving
00:59:03
Codeforces algorithms problem-solving

4,097 views

Streamed 5 months ago

Videos
Errichto Hard Algorithms
My Linux & Geany Setup 2025 | stream from 27.06.2025
02:22:21
My Linux & Geany Setup 2025 | stream from 27.06.2025

2,783 views

5 months ago

Errichto Hard Algorithms
CSES Robot Path live coding
01:44:58
CSES Robot Path live coding

7,521 views

2 years ago

Errichto Hard Algorithms
Codeforces/CSES live coding
01:44:58
Codeforces/CSES live coding

7,288 views

2 years ago

Errichto Hard Algorithms
CF Div. 1/2 Group Lesson - Train Maintenance
01:02:59
CF Div. 1/2 Group Lesson - Train Maintenance

5,578 views

4 years ago

Errichto Hard Algorithms
CF 745 Screencast
01:03:40
CF 745 Screencast

9,546 views

4 years ago

Errichto Hard Algorithms
Facebook Hacker Cup 2021 Round 2, Full Score (kind of)
03:09:12
Facebook Hacker Cup 2021 Round 2, Full Score (kind of)

5,233 views

4 years ago

Errichto Hard Algorithms
Codeforces Deltix (Div. 1+2) Screencast
02:15:08
Codeforces Deltix (Div. 1+2) Screencast

5,172 views

4 years ago

Errichto Hard Algorithms
Codeforces 722 Screencast (back to LGM!)
01:42:30
Codeforces 722 Screencast (back to LGM!)

12,263 views

4 years ago

Errichto Hard Algorithms
Google Hash Code 2021 Finals (would be 6th place with 3 extra minutes)
04:08:41
Google Hash Code 2021 Finals (would be 6th place with 3 extra minutes)

4,715 views

4 years ago

Errichto Hard Algorithms
Codeforces 718 (Div. 1 + 2)
02:46:41
Codeforces 718 (Div. 1 + 2)

8,309 views

4 years ago

Errichto Hard Algorithms
(4th place) Leetcode Biweekly 44
00:25:35
(4th place) Leetcode Biweekly 44

4,570 views

4 years ago

Errichto Hard Algorithms
Codechef Nov Lunchtime Screencast
02:48:02
Codechef Nov Lunchtime Screencast

6,941 views

5 years ago

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