Active and future streams
Name Streamer Start time Platform

Topic Stream 8: Bitwise Operations (see description for problems)

galen_colin Sep/19/2021 17:35 YouTube
Past streams
Name Streamer Start time Platform

Upsolving FHC Qual and R1

Errichto Sep/16/2021 19:00 Twitch

ITMO Lecture. SCC, 2-SAT

pashka Sep/15/2021 18:00 Twitch

ITMO Lecture. Graphs, DFS

pashka Sep/10/2021 18:00 Twitch

Virtual ICPC: Almost Algorithmic Contest with scott_wu

ecnerwala Sep/05/2021 21:32 Twitch

Round #742 (Div. 2) post-contest discussion

neal Sep/05/2021 19:35 Twitch

ARC 125 Virtual Contest

ecnerwala Aug/23/2021 03:21 Twitch

August 2021 CodeChef Cookoff Solution Explanations

Geothermal Aug/22/2021 22:15 YouTube

CF #739 Solution Explanations

Geothermal Aug/18/2021 19:55 YouTube

Codeforces Round #738 CodeChef Starters 8 Solution Explanations

Geothermal Aug/15/2021 19:55 YouTube

Codeforces Round #737 Solution Explanations

Geothermal Aug/09/2021 19:40 YouTube

3 Hard Interactive Problems

Errichto Aug/05/2021 19:05 Twitch

Solving ABC problems, having fun

pashka Aug/04/2021 19:00 Twitch

Solving ABC problems, having fun

pashka Aug/02/2021 18:00 Twitch

July 2021 CodeChef Lunchtime - Solution Explanations

Geothermal Jul/31/2021 18:35 YouTube

Solving ABC problems, having fun

pashka Jul/30/2021 20:00 Twitch

Edu Round #112 Solution Explanations

Geothermal Jul/30/2021 19:40 YouTube

CF #735 Solution Explanations

Geothermal Jul/29/2021 21:00 YouTube

CF #735 Solutions

Errichto Jul/29/2021 19:35 Twitch

Global 15 Upsolving

Errichto Jul/27/2021 19:05 Twitch

Harbour.Space Contest Discussion

Errichto Jul/22/2021 20:05 Twitch

[Easy] Solving A-D From Tourists Round (#733)

Errichto Jul/20/2021 19:05 Twitch

CF Round #733 Post-Contest Stream (feat. tourist)

ecnerwala Jul/17/2021 20:55 Twitch

CF Hard Problems (diff. 2500)

Errichto Jul/15/2021 19:05 Twitch

CF EDU Round 111 Post Contest Stream |A to E Solutions

HealthyUG Jul/14/2021 20:30 YouTube

CF Edu Round 111 post-contest discussion (ft. MyK_00L, taulant, Lorenzo_Ferrari)

TheScrasse Jul/14/2021 19:40 Twitch

CF Easy Problems (Div. 3)

Errichto Jul/13/2021 19:20 Twitch

CF 732 Recap + Upsolving

ecnerwala Jul/12/2021 02:00 Twitch

CF Round #731 (Div. 3) post-contest discussion

AnandOza Jul/10/2021 19:50 Twitch

Codeforces Round #731 Solution Stream

SecondThread Jul/10/2021 19:50 YouTube

Solving ABC problems, having fun

pashka Jul/09/2021 18:00 Twitch

CF #730 (Div. 2) Virtual Participation

Errichto Jul/08/2021 19:05 Twitch

Solving ABC problems, having fun

pashka Jul/07/2021 20:00 Twitch

Reading CF Blogs and Chatting

Errichto Jul/06/2021 19:05 Twitch

CF Round 729 Virtual Participation

ecnerwala Jul/05/2021 03:59 Twitch

div1-B CF Problem-Solving

Errichto Jul/02/2021 14:05 Twitch

Easy CF Problem-Solving

Errichto Jun/29/2021 19:30 Twitch

Tau Day + Kotlin Heros 7 Practice Stream

SecondThread Jun/29/2021 07:00 YouTube

CF Problem-Solving (diff. ~2000)

Errichto Jun/24/2021 19:05 Twitch

IOI predictions and chatting (ft. tmw, Petr, kostka, ...)

Errichto Jun/21/2021 19:00 Twitch

LATOKEN Round Recap, mBIT Standard Division after

ecnerwala Jun/14/2021 01:06 Twitch

mBIT Virtual Contest with scott_wu and stevenkplus

ecnerwala Jun/12/2021 22:30 Twitch

GCJ R3 upsolving

Errichto Jun/10/2021 19:05 Twitch

CF Problem-Solving

Errichto Jun/08/2021 19:05 Twitch

GCJ practice

Errichto Jun/01/2021 19:00 Twitch

Upsolving - Deltix Round H and CCO Day 1 (for real this time)

ecnerwala Jun/01/2021 00:00 Twitch

Deltix Round solutions A-F

Errichto May/30/2021 19:55 Twitch

ITMO Lecture. Complexity Classes

pashka May/28/2021 18:00 Twitch

Hard Atcoder Upsolving, AGC 46 F

Errichto May/27/2021 19:10 Twitch

Hard Atcoder Upsolving

Errichto May/25/2021 19:30 Twitch

CF 722 Div. 1 Solutions

Errichto May/24/2021 19:50 Twitch

Upsolving Kickstart Round C

ecnerwala May/24/2021 03:58 Twitch

ITMO Lecture. External Memory Algorithms

pashka May/21/2021 18:00 Twitch

How to not do a CF screencast

Ari May/20/2021 21:45 YouTube

Hard Atcoder Upsolving (One Third, AGC 32 F)

Errichto May/20/2021 19:05 Twitch

Hard Atcoder Upsolving

Errichto May/18/2021 19:05 Twitch

CCO Lockout vs ksun48

ecnerwala May/17/2021 00:00 Twitch

Google Code Jam R2 solutions

Errichto May/15/2021 19:35 Twitch

ITMO Lecture. Centroid Decomposition

pashka May/14/2021 18:00 Twitch

ITMO Lecture. Euler Tour Tree

pashka May/07/2021 18:00 Twitch

Segment Tree Implementation (CSES)

Errichto May/06/2021 19:00 Twitch

Hard-ish CF Problems Stream

Errichto May/04/2021 19:10 Twitch

Upsolving POI 24

ecnerwala May/03/2021 00:00 Twitch

GCJ Round 1C Virtual Contest

Errichto May/01/2021 19:05 Twitch

ITMO Lecture. Link-Cut Tree

pashka Apr/30/2021 18:00 Twitch

solving Servers from BOI 2021 in O(N*log(N))

Errichto Apr/29/2021 19:05 Twitch

CF Problem-Solving (difficulty 1600-2000)

Errichto Apr/27/2021 19:05 Twitch

Home Task Discussion

pashka Apr/24/2021 13:00 Twitch

ITMO Lecture. Heavy-Light Decomposition

pashka Apr/23/2021 18:00 Twitch

Google Kickstart Round B Upsolving

Errichto Apr/20/2021 19:05 Twitch

CF Round 716 Post Contest Stream

HealthyUG Apr/19/2021 18:50 YouTube

Home Task Discussion

pashka Apr/17/2021 13:00 Twitch

ITMO Lecture. LCA, Binary Lifting

pashka Apr/16/2021 18:00 Twitch

Long Stream: Codechef April Long Challenge Discussion (All Problems)

HealthyUG Apr/12/2021 12:30 YouTube

GCJ Round 1A Upsolving

Errichto Apr/10/2021 19:05 Twitch

GCJ 2019 1C Practice

Errichto Apr/08/2021 19:10 Twitch

CF #712 (Div. 1) Virtual Participation

Errichto Apr/06/2021 19:00 Twitch

NERC 2021 Virtual with scott_wu and ksun48

ecnerwala Apr/04/2021 23:00 Twitch

Home Task Discussion

pashka Apr/03/2021 12:00 Twitch

ITMO Lecture. Scapegoat Tree, List Order Maintenance

pashka Apr/02/2021 17:00 Twitch

Polygon - creating Gaussian Elimination problems

Errichto Mar/30/2021 19:00 Twitch

CF #710 (div. 3) F G

Errichto Mar/27/2021 19:05 Twitch

ITMO Lecture. Splay Tree

pashka Mar/26/2021 18:00 Twitch

Polygon - creating Gaussian Elimination problems

Errichto Mar/23/2021 19:05 Twitch

Upsolving + Recap - CF Round 709, CodeChef March CookOff, JOISC 2021 Day 1-2

ecnerwala Mar/22/2021 06:00 Twitch

Codeforces Problem-Solving (difficulty 1500-2000)

Errichto Mar/20/2021 19:15 Twitch

Home Task Discussion

pashka Mar/20/2021 13:00 Twitch

ITMO Lectures. Treap

pashka Mar/19/2021 18:00 Twitch

CF EDU Round 106 Virtual Participation

HealthyUG Mar/18/2021 20:00 YouTube

Round #708 (Div. 2) post-contest discussion

neal Mar/17/2021 19:50 Twitch

Upsolving - ARC114 Virtual Contest

ecnerwala Mar/15/2021 00:04 Twitch

ITMO Lecture. AVL Tree

pashka Mar/12/2021 18:00 Twitch

Upsolving - finishing up recent contests

ecnerwala Mar/08/2021 01:00 Twitch

Kotlin Heros: Practice 6 Live Solving

SecondThread Mar/07/2021 20:00 YouTube

CF Easy Problem-Solving (but first CF 705 F on HealthyUGs channel)

Errichto Mar/06/2021 21:00 Twitch

Codeforces Round 705 | Post Contest Stream (Rank 32)

HealthyUG Mar/06/2021 19:20 YouTube

ITMO Lecture. 2D Problems on Segment Trees

pashka Mar/05/2021 18:00 Twitch

CF Global Round 13 upsolving

Errichto Mar/02/2021 19:45 Twitch

Upsolving - CF Global Round 13 OpenCup GP of Tokyo

ecnerwala Mar/01/2021 02:00 Twitch

Google Hash Code Qual discussion

Errichto Feb/28/2021 19:45 Twitch

Home Task Discussion

pashka Feb/27/2021 13:00 Twitch

ITMO Lecture. Fenwick Tree, Sparse Table

pashka Feb/26/2021 18:00 Twitch

Matrix Exponentiation Problems (Mashup Link in video description)

HealthyUG Feb/25/2021 16:10 YouTube

Topic Stream 7: Graphs (click for mashup)

galen_colin Feb/24/2021 17:30 YouTube

Google Hash Code warm-up

Errichto Feb/23/2021 19:00 Twitch

Home Task Discussion

pashka Feb/21/2021 17:00 Twitch

Codeforces Problem-Solving (difficulty 1600-2000)

Errichto Feb/20/2021 19:05 Twitch

Atcoder Beginner Contest 192 post-contest discussion

AnandOza Feb/20/2021 16:53 YouTube

ITMO Lecture. Segment Trees

pashka Feb/19/2021 18:00 Twitch

CF Round 703 | Screencast + Post Contest Discussion | All Problems

HealthyUG Feb/18/2021 19:32 YouTube

CF Round #702 (Div. 3) Virtual Participation (with Explanations)

HealthyUG Feb/16/2021 19:35 YouTube

Hard Atcoder Upsolving

Errichto Feb/16/2021 19:05 Twitch

CF Edu Round 104 Live Virtual Participation

HealthyUG Feb/15/2021 21:00 YouTube

Edu Round 104 post-contest discussion

AnandOza Feb/15/2021 19:50 Twitch

Topic Stream 6: DP Optimizations (segment tree, convex hull trick)

galen_colin Feb/14/2021 17:30 YouTube

Round #701 (Div. 2) post-contest discussion

neal Feb/12/2021 19:50 Twitch

ITMO Lecture. Segment Trees

pashka Feb/12/2021 18:00 Twitch

CF 694-E Strange Permutation, K-th Lexicographical Sequence

Errichto Feb/09/2021 19:00 Twitch

CF Round 700 Post-Contest Discussion

ecnerwala Feb/07/2021 20:15 Twitch

Codeforces Problem-Solving (difficulty 1600-2000)

Errichto Feb/06/2021 19:00 Twitch

Atcoder ABC 191 - solving + explaining

AnandOza Feb/06/2021 16:59 Twitch

Easy Codeforces Problem-Solving

Errichto Jan/30/2021 19:05 Twitch

Atcoder (ABC 190) post-contest discussion

AnandOza Jan/30/2021 16:45 Twitch

CF Edu Round 103 Post Contest Discussion

HealthyUG Jan/29/2021 19:40 YouTube

Codeforces Round #698 (Div. 2) Solutions Discussion

stevenkplus Jan/28/2021 19:55 Twitch

ICPC Swiss Subregional 2019 ft. Radewoosh

Errichto Jan/26/2021 18:00 Twitch

Round #697 (Div. 3) post-contest discussion

neal Jan/25/2021 20:00 Twitch

Working on book code

ecnerwala Jan/25/2021 01:00 Twitch

Virtual Contest (CF #624, Div3)

AnandOza Jan/24/2021 19:15 Twitch

CSES Closest Pair Of Points

Errichto Jan/23/2021 19:00 Twitch

Atcoder Beginner Contest 189 Post-contest Discussion

AnandOza Jan/23/2021 16:45 Twitch

(Software Engineering) Building a 1v1 Puzzle Game

stevenkplus Jan/20/2021 03:00 Twitch

CF Round 696 Post Contest Discussion

HealthyUG Jan/19/2021 19:40 YouTube

Hard Atcoder Upsolving, AGC 50 E

Errichto Jan/19/2021 19:00 Twitch

CSES Geometry Problems

Errichto Jan/16/2021 19:00 Twitch

Lecture. Link-Eval

pashka Jan/15/2021 17:00 Twitch

Edu Round 102: Post-contest stream

stevenkplus Jan/14/2021 19:44 Twitch

(Hard) Atcoder Upsolving, AGC 50 D

Errichto Jan/12/2021 19:00 Twitch

Casual Stream: Diagram drawing practice

stevenkplus Jan/12/2021 06:45 Twitch

Virtual AtCoder Regular Contest 111

ecnerwala Jan/11/2021 01:15 Twitch

Data structure stream #3: New Year Prime Contest 2021

ko_osaga Jan/10/2021 16:00 Twitch

Road to LGM: Training Session

stevenkplus Jan/10/2021 05:25 Twitch

Codeforces Problem-Solving (difficulty 1700-2200)

Errichto Jan/09/2021 19:00 Twitch

Atcoder: ARC 111 post-contest discussion (ft. neal)

AnandOza Jan/09/2021 17:15 Twitch

Lecture. α(m, n) time complexity of Union-Find

pashka Jan/09/2021 17:00 Twitch

Round #695 (Div. 2) post-contest discussion

neal Jan/08/2021 19:35 Twitch

Road to LGM: Training Session

stevenkplus Jan/08/2021 07:10 Twitch

Round #694 Post-Contest Discussion

Errichto Jan/05/2021 19:40 Twitch

Round #693 (Div. 3) post-contest discussion

AnandOza Jan/04/2021 19:43 Twitch

Upsolving POI

ecnerwala Jan/04/2021 01:00 Twitch

Easy Codeforces Problem-Solving

Errichto Jan/02/2021 19:00 Twitch

Atcoder Beginner Contest 187 Post-contest Discussion

AnandOza Jan/02/2021 16:45 Twitch

Good Bye 2020 post-contest discussion

AnandOza Dec/30/2020 20:40 Twitch

(Hard) Atcoder Upsolving, AGC 50

Errichto Dec/29/2020 19:00 Twitch

Advent of Code 2019 Speedrun!

ecnerwala Dec/29/2020 02:00 Twitch

Educational Round 101 post-contest discussion

neal Dec/28/2020 19:35 Twitch

AtCoder AGC 051 Post-Contest Discussion + Upsolving

ecnerwala Dec/27/2020 19:45 Twitch

AtCoder AGC 050 + CodeChef LTIME91 Post-Contest Discussion

ecnerwala Dec/26/2020 22:15 Twitch

Virtual: Atcoder Beginner Contest 178

AnandOza Dec/25/2020 20:25 Twitch

ITMO Lecture. Hashing, Bloom filter

pashka Dec/25/2020 18:00 Twitch

CSES DP Problems

AnandOza Dec/24/2020 19:00 Twitch

CF Round 692 post-contest discussion + ICPC NA Practice 4

ecnerwala Dec/20/2020 20:15 Twitch

Team Stream: Round #691 virtual (ft. neal and saketh)

AnandOza Dec/19/2020 21:00 Twitch

Team Stream: Round #691 virtual (ft. AnandOza, saketh)

neal Dec/19/2020 21:00 Twitch

Atcoder Beginner Contest 186 Post-contest Discussion

AnandOza Dec/19/2020 16:45 YouTube

Round #691 Post-Contest Discussion ft. Endagorion (div2 only)

Errichto Dec/19/2020 15:00 Twitch

Solving Codeforces Edu #99 E (Expected Damage)

AnandOza Dec/18/2020 19:30 YouTube

ITMO Lecture. Hash Tables

pashka Dec/18/2020 18:00 Twitch

Education Round 100: Problem Discussion Analysis

stevenkplus Dec/17/2020 19:40 Twitch

Virtual: Codeforces Round #690 (Div. 3)

AnandOza Dec/16/2020 06:00 YouTube

Round #690 (Div. 3) post-contest discussion

neal Dec/15/2020 19:35 Twitch

(Hard) Atcoder Upsolving, AGC 46

Errichto Dec/15/2020 19:00 Twitch

Advent of Code Day 15 (with Scott Wu on voice)

ecnerwala Dec/15/2020 07:58 Twitch

Virtual: Atcoder Beginner Contest 185

AnandOza Dec/13/2020 20:05 YouTube

Yosupo Judge Stream: Implementing Subquadratic Directed MST

ko_osaga Dec/13/2020 15:00 Twitch

Number Theory Problems (see my blog for mashup)

AnandOza Dec/13/2020 04:00 YouTube

North America ICPC Practice ft. Monogon

Kuroni Dec/12/2020 21:00 Twitch

North America ICPC Practice ft. Kuroni

1-gon Dec/12/2020 20:59 Twitch

North America ICPC Practice Contest #1

Geothermal Dec/12/2020 20:55 YouTube

Medium Level Graph Problems (see my blog for mashup link)

HealthyUG Dec/12/2020 18:00 YouTube

Advent Of Code (Daily stream starting today)

ecnerwala Dec/12/2020 07:55 Twitch

Solving + Discussing Problems

AnandOza Dec/12/2020 03:15 YouTube

Round #689 (Div. 2) post-contest discussion

neal Dec/11/2020 19:35 Twitch

ITMO Lecture. DP on subsets, DP on profiles

pashka Dec/11/2020 18:00 Twitch

Advent of Code, using only HTML and JS!

stevenkplus Dec/11/2020 07:05 Twitch

Advent of Code in HTML, Javascript, and CSS

stevenkplus Dec/10/2020 06:00 Twitch

Topic Stream 5: Constructives

galen_colin Dec/09/2020 17:30 YouTube

Solving + Discussing Problems

AnandOza Dec/09/2020 06:15 YouTube

Upsolving with discussion (ARC 110) + chess

neal Dec/08/2020 19:00 Twitch

(Hard) Atcoder Grand Contest 49 E

Errichto Dec/08/2020 19:00 Twitch

Solving + Discussing Problems

AnandOza Dec/07/2020 05:30 YouTube

Global Round 12 Recap + Upsolving

ecnerwala Dec/06/2020 20:45 Twitch

ITMO Lecture. Knapsack Problem

pashka Dec/04/2020 18:00 Twitch

Topic Stream 4: Probability + Combinatorics

galen_colin Dec/02/2020 18:00 YouTube

(Hard) Atcoder Grand Contest 49

Errichto Dec/01/2020 20:00 Twitch

Educational Round 99 post-contest discussion

neal Nov/30/2020 19:35 Twitch


scott_wu Nov/29/2020 22:07 Twitch

ARC + Puzzles w ecnerwala

scott_wu Nov/29/2020 20:30 Twitch

Solving with scott_wu

ecnerwala Nov/29/2020 20:30 Twitch

SecondThread vs. galen_colin Lockout Duel

neal Nov/29/2020 19:30 Twitch

Lazy Coding Stream

1-gon Nov/28/2020 08:28 Twitch

Codeforces and Chill

stevenkplus Nov/27/2020 21:00 Twitch

ITMO Lecture. Dynamic Programming 2

pashka Nov/27/2020 18:00 Twitch

2020 CCPC Changchun with ksun48, scott_wu, and stevenkplus

ecnerwala Nov/26/2020 21:36 Twitch

Topic Stream 3: Trees

galen_colin Nov/25/2020 18:00 YouTube

ABC184 Virtual Participation

HealthyUG Nov/25/2020 15:35 YouTube

Round #686 (Div. 3) post-contest discussion

neal Nov/24/2020 19:35 Twitch

Upsolving - CF Round 685 (Div 2) Virtual

ecnerwala Nov/23/2020 00:00 Twitch

TCO Finals - Egor (10 mins delay)

Egor Nov/21/2020 20:05 Twitch

TCO20 Algorithm Finals

Errichto Nov/21/2020 20:00 Twitch

CodinGame Part 3.5 (BFS)

Errichto Nov/20/2020 19:00 Twitch

ITMO Lecture. Dynamic Programming

pashka Nov/20/2020 18:00 Twitch

Educational Round 98 post-contest discussion

neal Nov/19/2020 19:35 Twitch

CodinGame Part 3

Errichto Nov/19/2020 19:00 Twitch

topcoder open semifinals - Egor (10 minutes delay)

Egor Nov/18/2020 18:05 Twitch

Topic Stream 2: Dynamic Programming Part 2

galen_colin Nov/18/2020 18:00 YouTube

TCO20 Algorithm Semifinals 2

Errichto Nov/18/2020 18:00 Twitch

Upsolving + Gaming

ecnerwala Nov/16/2020 01:00 Twitch

CodinGame Part 2 (DP)

Errichto Nov/15/2020 20:05 Twitch

Meet IT Round #683 Live Stream

tnowak Nov/15/2020 20:05 YouTube

Impromptu stream w stevenkplus

scott_wu Nov/15/2020 07:05 Twitch

Lockout Championship top8 commentary

Errichto Nov/14/2020 18:30 Twitch

Lockout Championship Top 8 - Egor

Egor Nov/14/2020 18:25 Twitch

Upsolving Codeforces Round #682 (virtual)

galen_colin Nov/14/2020 17:00 Twitch

ITMO Lectures. Fibonacci Heaps

pashka Nov/13/2020 18:00 Twitch

TCO20 Algorithm Semifinals 1

Errichto Nov/13/2020 17:45 Twitch

CodinGame Fall Challenge 2020

Errichto Nov/12/2020 19:00 Twitch

Topic Stream 1: Dynamic Programming

galen_colin Nov/09/2020 18:30 YouTube

Upsolving in Rust! CF Round 680

ecnerwala Nov/09/2020 01:00 Twitch

Round #674 Div. 3 Virtual (+ OpenCup discussion?)

neal Nov/09/2020 00:00 Twitch

CF Round #676 (Div. 2) Virtual

neal Nov/07/2020 23:30 Twitch

Easy Codeforces Problem-Solving

Errichto Nov/07/2020 19:00 Twitch

JetBrains Knowledge Day

ICPCNews Nov/06/2020 14:00 YouTube

Hard Atcoder Upsolving, AGC 35

Errichto Nov/03/2020 19:00 Twitch

Codeforces Round #681 Virtual Participation

Geothermal Nov/02/2020 23:30 YouTube

Upsolving Codeforces Round #680 (virtual)

galen_colin Nov/01/2020 18:50 YouTube

Easy Codeforces Problem-Solving

Errichto Oct/31/2020 20:00 Twitch

ITMO Lecture. Disjoint Set

pashka Oct/30/2020 18:00 Twitch

Hard Atcoder Upsolving, AGC 48

Errichto Oct/27/2020 20:00 Twitch

Upsolving - CF 679 Div1 Virtual Contest

ecnerwala Oct/26/2020 00:00 Twitch

ITMO Lecture. Linked Lists

pashka Oct/23/2020 18:00 Twitch