Uploaded January 2021 | Updated September 2026, 3 weeks ago
Solving competitive programming problems from codeforces.com
Streaming schedule: calendar.google.com/calendar/embed?src=0qldhlvr0oqd867pdi8nkm8s04%40group.calendar.google.com
- FAQ & GitHub Wiki: github.com/Errichto/youtube/wiki/FAQ
- Discord: discord.gg/errichto
- Twitch: twitch.tv/errichto
- Main YT channel with educational videos: youtube.com/errichto
0:00 Intro
5:40 Ceil Divisions
29:33 13th Labour of Heracles
49:40 Ralph And His Tour in binary
1:21:20 Pairs
1:46:15 Errich-Tac-Toe (Easy)
2:06:20 Errich-Tac-Toe (Hard)
Solving competitive programming problems from codeforces.com
Streaming schedule: calendar.google.com/calendar/embed?src=0qldhlvr0oqd867pdi8nkm8s04%40group.calendar.google.com
- FAQ & GitHub Wiki: github.com/Errichto/youtube/wiki/FAQ
- Discord: discord.gg/errichto
- Twitch: twitch.tv/errichto
- Main YT channel with educational videos: youtube.com/errichto
0:00 Intro
5:40 Ceil Divisions
29:33 13th Labour of Heracles
49:40 Ralph And His Tour in binary
1:21:20 Pairs
1:46:15 Errich-Tac-Toe (Easy)
2:06:20 Errich-Tac-Toe (Hard)










