Just a reminder that Um still exists and I just posted Episode 9. And it is just 0:54 long, no reason not to watch. Magic words to attract attention: Um_nik does binary search, $$$O(\log N)$$$ per query online solution to Stamp Rally.

I switched to the "1 video every 2 days" schedule, it seems manageable.

The list now contains 15 problems. Also, there are slides for the problems for which videos are already posted.

Checklist by aryanc403 for tracking your progress on Um problems, Playlist with all Um episodes, My YouTube channel, Discord, Um_nik World.