Канал: Errichto Hard Algorithms

Test Programming Stream 0

Test Programming Stream 0

CSES Robot Path live coding

CSES Robot Path live coding

Codeforces/CSES live coding

Codeforces/CSES live coding

[hard] Codeforces live coding

[hard] Codeforces live coding

Codeforces TypeDB live coding

Codeforces TypeDB live coding

Codeforces Good Bye 2022 live coding

Codeforces Good Bye 2022 live coding

Codeforces Edu 142 (Div. 2) live coding

Codeforces Edu 142 (Div. 2) live coding

(Hard) Codeforces 844 (Div. 1+2) EGH

(Hard) Codeforces 844 (Div. 1+2) EGH

Codeforces 844 (Div. 1+2), Tourist's Round

Codeforces 844 (Div. 1+2), Tourist's Round

Google Hash Code 2022 Quals Upsolving

Google Hash Code 2022 Quals Upsolving

Compilation error = remove code [Ukraine charity stream]

Compilation error = remove code [Ukraine charity stream]

Google Hash Code practice

Google Hash Code practice

Easy Coding Problems (Reply Code Challenge Teen Edition)

Easy Coding Problems (Reply Code Challenge Teen Edition)

Coding Wordle Optimally (part 2)

Coding Wordle Optimally (part 2)

Coding Wordle Optimally

Coding Wordle Optimally

6 Easy Codeforces Problems

6 Easy Codeforces Problems

[Hard] Square Root Decomposition – Homework

[Hard] Square Root Decomposition – Homework

Square Root Decomposition, Mo's Algorithm

Square Root Decomposition, Mo's Algorithm

Codeforces Div1 Problems of the Week

Codeforces Div1 Problems of the Week

(Hard) Atcoder Grand Contest 54 E - ZigZag Break

(Hard) Atcoder Grand Contest 54 E - ZigZag Break

Watching ICPC World Finals Rehearsal ft. kostka

Watching ICPC World Finals Rehearsal ft. kostka

Meet in the Middle | Tutorial & Problems

Meet in the Middle | Tutorial & Problems

Codeforces Problems of the Week

Codeforces Problems of the Week

CF Div. 1/2 Group Lesson - Train Maintenance

CF Div. 1/2 Group Lesson - Train Maintenance

CF 745 Screencast

CF 745 Screencast

(Hard) Atcoder Grand Contest 54 D

(Hard) Atcoder Grand Contest 54 D

Codeforces Blogs & "The Ultimate Topic List"

Codeforces Blogs & "The Ultimate Topic List"

Facebook Hacker Cup 2021 Round 2, Full Score (kind of)

Facebook Hacker Cup 2021 Round 2, Full Score (kind of)

Facebook Hacker Cup Upsolving

Facebook Hacker Cup Upsolving

3 Hard Interactive Problems

3 Hard Interactive Problems

Rating Codechef July Lunchtime Problems

Rating Codechef July Lunchtime Problems

Coordinate Compression, LC 1632 Rank Transform of a Matrix

Coordinate Compression, LC 1632 Rank Transform of a Matrix

Codeforces 735 (Div. 2) Analysis

Codeforces 735 (Div. 2) Analysis

Codeforces Global Round 15 Upsolving

Codeforces Global Round 15 Upsolving

Leetcode Hard Problems Are Easy

Leetcode Hard Problems Are Easy

Codeforces Harbour.Space Contest Discussion

Codeforces Harbour.Space Contest Discussion

Codeforces Easy Problems, Tourist's Round A-D (733)

Codeforces Easy Problems, Tourist's Round A-D (733)

Codeforces Hard Problems

Codeforces Hard Problems

Codeforces Easy Problems (#731 Div. 3)

Codeforces Easy Problems (#731 Div. 3)

LeetCode Biweekly 56 Analysis

LeetCode Biweekly 56 Analysis

Codeforces #730 (Div. 2) Virtual Participation

Codeforces #730 (Div. 2) Virtual Participation

Reading Codeforces Blogs & Chatting

Reading Codeforces Blogs & Chatting

LeetCode Is Easy

LeetCode Is Easy

Div1-B Codeforces Problems

Div1-B Codeforces Problems

Easy Codeforces Problem-Solving

Easy Codeforces Problem-Solving

LeetCode Biweekly 55 Analysis

LeetCode Biweekly 55 Analysis

Codeforces Problem-Solving (difficulty ~2000)

Codeforces Problem-Solving (difficulty ~2000)

IOI 2021 Predictions & Chatting ft. Petr, tmwilliam

IOI 2021 Predictions & Chatting ft. Petr, tmwilliam

LeetCode Is Easy

LeetCode Is Easy

Boring Programming Stream & Chatting

Boring Programming Stream & Chatting

LeetCode Is Easy - House Robber III, Largest Magic Square, ...

LeetCode Is Easy - House Robber III, Largest Magic Square, ...

Google Code Jam R3 Upsolving

Google Code Jam R3 Upsolving

Codeforces Problem-Solving (Div2 D)

Codeforces Problem-Solving (Div2 D)

Google Code Jam practice

Google Code Jam practice

Codeforces Deltix (Div. 1+2) Screencast

Codeforces Deltix (Div. 1+2) Screencast

Codeforces Deltix Round Solutions

Codeforces Deltix Round Solutions

(Hard) Atcoder Problem-Solving, AGC 46 F

(Hard) Atcoder Problem-Solving, AGC 46 F

(Hard) Atcoder Problem-Solving, AGC 46 E

(Hard) Atcoder Problem-Solving, AGC 46 E

Codeforces 722 (Div. 1) Solutions

Codeforces 722 (Div. 1) Solutions

Codeforces 722 Screencast (back to LGM!)

Codeforces 722 Screencast (back to LGM!)

Coding Interview Problems Are Easy | leetcode.com

Coding Interview Problems Are Easy | leetcode.com

(Hard) Atcoder Problem-Solving, AGC 32 F

(Hard) Atcoder Problem-Solving, AGC 32 F

(Hard) Atcoder Problem-Solving

(Hard) Atcoder Problem-Solving

Google Code Jam 2021 R2 Solutions

Google Code Jam 2021 R2 Solutions

TRIE in Coding Interviews

TRIE in Coding Interviews

Segment Tree (Implementation)

Segment Tree (Implementation)

(Hard) Codeforces Problem-Solving, Strings & Segment Tree

(Hard) Codeforces Problem-Solving, Strings & Segment Tree

Google Code Jam 2021 Round 1C Upsolving

Google Code Jam 2021 Round 1C Upsolving

(Hard) Servers from BOI 2021, O(N*log(N)) solution

(Hard) Servers from BOI 2021, O(N*log(N)) solution

Competitive Programming Problem-Solving (codeforces.com)

Competitive Programming Problem-Solving (codeforces.com)

Google Hash Code 2021 Finals (would be 6th place with 3 extra minutes)

Google Hash Code 2021 Finals (would be 6th place with 3 extra minutes)

Codeforces 718 (Div. 1 + 2)

Codeforces 718 (Div. 1 + 2)

Tree Algorithms Live-Stream | codeforces.com

Tree Algorithms Live-Stream | codeforces.com

Google Kickstart 2021 Round B Upsolving

Google Kickstart 2021 Round B Upsolving

Coding Interview Problems Are Easy | leetcode.com

Coding Interview Problems Are Easy | leetcode.com

Watching Algorithmic Videos, Lazy Stream

Watching Algorithmic Videos, Lazy Stream

Google Code Jam 2021 Round 1A Upsolving

Google Code Jam 2021 Round 1A Upsolving

Google Code Jam Round 1 Practice

Google Code Jam Round 1 Practice

Codeforces 712 (Div. 1) Virtual Participation

Codeforces 712 (Div. 1) Virtual Participation

Creating Algo Problems, Gaussian Elimination

Creating Algo Problems, Gaussian Elimination

Codeforces 710 (Div. 3) F & G Upsolving

Codeforces 710 (Div. 3) F & G Upsolving

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

Creating Algo Problems, Gaussian Elimination

Creating Algo Problems, Gaussian Elimination

codeforces.com - Competitive Programming Problem-Solving

codeforces.com - Competitive Programming Problem-Solving

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

Algorithmic Research (Gaussian Elimination?)

Algorithmic Research (Gaussian Elimination?)

binarysearch.com Coding Interview Problem-Solving

binarysearch.com Coding Interview Problem-Solving

Codeforces Problem-Solving (short stream)

Codeforces Problem-Solving (short stream)

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

Setting up the stream, then Codeforces upsolving

Setting up the stream, then Codeforces upsolving

Google Hash Code 2021 Qual' solution (2nd place)

Google Hash Code 2021 Qual' solution (2nd place)

Google Hash Code 2021 warm-up

Google Hash Code 2021 warm-up

Codeforces Problem-Solving (short stream)

Codeforces Problem-Solving (short stream)

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

(Hard) Atcoder Grand Contest Problem-Solving

(Hard) Atcoder Grand Contest Problem-Solving

Hard "K-th Lexicographical Sequence" Codeforces Problem

Hard "K-th Lexicographical Sequence" Codeforces Problem

Codeforces Problem-Solving Live

Codeforces Problem-Solving Live

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

Codeforces Problem-Solving Live

Codeforces Problem-Solving Live

Solving Easy Google Interview Problems Live | LeetCode

Solving Easy Google Interview Problems Live | LeetCode

ICPC Swiss Subregional 2019 ft. Radewoosh

ICPC Swiss Subregional 2019 ft. Radewoosh

Closest Pair of Points | Coding Live!

Closest Pair of Points | Coding Live!

(4th place) Leetcode Biweekly 44

(4th place) Leetcode Biweekly 44

Solving Hard Google Interview Problems Live | binarysearch.io

Solving Hard Google Interview Problems Live | binarysearch.io

(Hard) Number Theory, Atcoder Grand Contest 50 E

(Hard) Number Theory, Atcoder Grand Contest 50 E

CSES Geometry Problem Set | Coding Live!

CSES Geometry Problem Set | Coding Live!

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

(Hard) Atcoder Grand Contest 50 D

(Hard) Atcoder Grand Contest 50 D

Codeforces Problem-Solving Live

Codeforces Problem-Solving Live

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

Codeforces Round #694 Solutions

Codeforces Round #694 Solutions

Codeforces Problem-Solving Live 001

Codeforces Problem-Solving Live 001

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

(Hard) Atcoder Grand Contest 50

(Hard) Atcoder Grand Contest 50

Codeforces Round #691 Discussion ft. Endagorion

Codeforces Round #691 Discussion ft. Endagorion

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

(Hard) Atcoder Grand Contest 46

(Hard) Atcoder Grand Contest 46

Solving Coding Interview Problems live!

Solving Coding Interview Problems live!

(Hard) Atcoder Grand Contest 49 E

(Hard) Atcoder Grand Contest 49 E

Leetcode Coding Interview Problems live!

Leetcode Coding Interview Problems live!

(Hard) Atcoder Grand Contest 49

(Hard) Atcoder Grand Contest 49

Codechef Review

Codechef Review

Codechef Nov Lunchtime Screencast

Codechef Nov Lunchtime Screencast

Testing Div4 Round in Polygon (Codeforces)

Testing Div4 Round in Polygon (Codeforces)

Testing Div4-A in Polygon (Codeforces)

Testing Div4-A in Polygon (Codeforces)

Fixing Bad Problem in Polygon (Codeforces)

Fixing Bad Problem in Polygon (Codeforces)

Bot Tournament | CodinGame Part 3.5 (BFS)

Bot Tournament | CodinGame Part 3.5 (BFS)

Bot Tournament | CodinGame Part 3

Bot Tournament | CodinGame Part 3

(Hard) Atcoder Grand Contest 41 F

(Hard) Atcoder Grand Contest 41 F

Codeforces Round 684, no commentary

Codeforces Round 684, no commentary

Bot Tournament | CodinGame Part 2 (Dynamic Programming)

Bot Tournament | CodinGame Part 2 (Dynamic Programming)

Codeforces Round 683 (7th place)

Codeforces Round 683 (7th place)

1v1 Coding Lockout Championship Finals

1v1 Coding Lockout Championship Finals

Bot Tournament | CodinGame Fall Challenge 2020 - Getting Started

Bot Tournament | CodinGame Fall Challenge 2020 - Getting Started

(Hard) Atcoder Grand Contest 48 E

(Hard) Atcoder Grand Contest 48 E

Easy Codeforces Problem-Solving

Easy Codeforces Problem-Solving

Dynamic Programming in Coding Interviews (Leetcode)

Dynamic Programming in Coding Interviews (Leetcode)

(Hard) Atcoder Grand Contest 35

(Hard) Atcoder Grand Contest 35

Easy Codeforces Problem-Solving

Easy Codeforces Problem-Solving

Leetcode Biweekly 38 (With Solutions Explained At The End)

Leetcode Biweekly 38 (With Solutions Explained At The End)

Coding & Chatting until 20k subs

Coding & Chatting until 20k subs

Coding Interviews Are Easy (Leetcode problem-solving)

Coding Interviews Are Easy (Leetcode problem-solving)

(Hard) Atcoder Grand Contest 48

(Hard) Atcoder Grand Contest 48

Codeforces Round 676 (Div. 2) Screencast & Commentary

Codeforces Round 676 (Div. 2) Screencast & Commentary

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

(Hard) Atcoder Grand Contest 48 (chat at https://www.twitch.tv/errichto)

(Hard) Atcoder Grand Contest 48 (chat at https://www.twitch.tv/errichto)

(2nd place) Codechef October Cook-off Screencast & Commentary

(2nd place) Codechef October Cook-off Screencast & Commentary

Codeforces Raif Round 1 Screencast

Codeforces Raif Round 1 Screencast

Codeforces Raif Round 1 Solutions

Codeforces Raif Round 1 Solutions

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

Learning Hard Algorithms

Learning Hard Algorithms

Codeforces Global Round 11 Screencast

Codeforces Global Round 11 Screencast

Codeforces Global Round 11 Solutions

Codeforces Global Round 11 Solutions

Among Us with Programmers (Discord Server only)

Among Us with Programmers (Discord Server only)

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

(Hard) Atcoder Grand Contest Upsolving (chat here https://www.twitch.tv/errichto)

(Hard) Atcoder Grand Contest Upsolving (chat here https://www.twitch.tv/errichto)

Among Us with Competitive Programmers

Among Us with Competitive Programmers

Easy Codeforces Problem-Solving

Easy Codeforces Problem-Solving

Among Us with Competitive Programmers

Among Us with Competitive Programmers

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

Coding Interviews Are Easy (Leetcode, BinarySearch.com)

Codeforces Grakn Round Screencast

Codeforces Grakn Round Screencast

(Hard) Atcoder Grand Contest 45 Upsolving

(Hard) Atcoder Grand Contest 45 Upsolving

Codeforces #673 Screencast (6th place)

Codeforces #673 Screencast (6th place)

Codechef Sep Lunchtime Screencast

Codechef Sep Lunchtime Screencast

(Hard) Atcoder Grand Contest 25 Upsolving

(Hard) Atcoder Grand Contest 25 Upsolving

1v1 Coding vs. gamegame | Lockout Championship R6

1v1 Coding vs. gamegame | Lockout Championship R6

Solving Coding Interview Problems: Leetcode, BinarySearch

Solving Coding Interview Problems: Leetcode, BinarySearch

Algo Problem-Solving (Codeforces, BinarySearch) (live chat at twitch.tv/errichto)

Algo Problem-Solving (Codeforces, BinarySearch) (live chat at twitch.tv/errichto)

Codechef September Cook-off Screencast (3rd place)

Codechef September Cook-off Screencast (3rd place)

BinarySearch Weekly Contest 25 Screencast (top3)

BinarySearch Weekly Contest 25 Screencast (top3)

Planning Programming Videos (live chat at twitch.tv/errichto)

Planning Programming Videos (live chat at twitch.tv/errichto)

Preparing for Facebook Hacker Cup Round 3 (live chat at twitch.tv/errichto)

Preparing for Facebook Hacker Cup Round 3 (live chat at twitch.tv/errichto)

Codechef Problem-Solving (go to twitch.tv/errichto for live chat)

Codechef Problem-Solving (go to twitch.tv/errichto for live chat)

1v1 Coding | Lockout Championship R5 (then a hard CF problem)

1v1 Coding | Lockout Championship R5 (then a hard CF problem)

Coding & Chatting

Coding & Chatting

Codeforces #668 | Algo & Coding Stream #13

Codeforces #668 | Algo & Coding Stream #13

JOI Open Contest 2020 (without coding)

JOI Open Contest 2020 (without coding)

Topcoder Open Round 4 Screencast

Topcoder Open Round 4 Screencast

Leetcode Biweekly #34 Screencast & Commentary

Leetcode Biweekly #34 Screencast & Commentary

1v1 Coding | 2020 Lockout Championship R4

1v1 Coding | 2020 Lockout Championship R4

1v1 Coding | 2020 Lockout Championship R3

1v1 Coding | 2020 Lockout Championship R3

Codeforces #666 Screencast

Codeforces #666 Screencast

1v1 Coding | 2020 Lockout Championship R2

1v1 Coding | 2020 Lockout Championship R2

CEOI 2020 Day 2 Screencast (Olympiad in Informatics)

CEOI 2020 Day 2 Screencast (Olympiad in Informatics)

CEOI 2020 Day 1 Screencast (Olympiad in Informatics)

CEOI 2020 Day 1 Screencast (Olympiad in Informatics)

1v1 Coding | 2020 Lockout Championship

1v1 Coding | 2020 Lockout Championship

Topcoder Open Round 3B Screencast

Topcoder Open Round 3B Screencast

Codeforces Global R10 - Screencast & Commentary

Codeforces Global R10 - Screencast & Commentary

Codeforces #664 - Screencast & Commentary

Codeforces #664 - Screencast & Commentary

AtCoder Grand Contest 047 (my round!)

AtCoder Grand Contest 047 (my round!)

Chatting, Planning Videos | Boring Programming Stream #23

Chatting, Planning Videos | Boring Programming Stream #23

Getting Last Place in Topcoder Open Round 3A

Getting Last Place in Topcoder Open Round 3A

Codeforces #659 - Screencast & Commentary

Codeforces #659 - Screencast & Commentary

Lockout Coding Competition E01 feat. tourist, Radewoosh, ...

Lockout Coding Competition E01 feat. tourist, Radewoosh, ...

ICPC 2020 Graph Challenge

ICPC 2020 Graph Challenge

Fast Coding With William Lin | Algo & Coding Stream #12

Fast Coding With William Lin | Algo & Coding Stream #12

Codeforces Global 8 - Screencast & Commentary

Codeforces Global 8 - Screencast & Commentary

Atcoder Grand Contest 45 - Screencast & Commentary

Atcoder Grand Contest 45 - Screencast & Commentary

Codeforces #647 - Screencast & Commentary

Codeforces #647 - Screencast & Commentary

Gauss & Matrix Expo | Algo & Coding Stream #11

Gauss & Matrix Expo | Algo & Coding Stream #11