Uploaded July 2021 | Updated September 2026, 3 weeks ago

---

Solving har problems from codeforces.com
Live chat: twitch.tv/popout/errichto/chat?popout=

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/YWb3Bmg
- Twitch: twitch.tv/errichto
- Main YT channel with educational videos: youtube.com/errichto