Problemset link: https://codeforces.com/contestInvitat...

Part 1 (I introduce DP and cover mashup problems AH, K):    • Complete Dynamic Programming Practice...  

I end up finishing the mashup this time.

Timestamps:
Intro/being stupid 00:00
Mashup I 05:02
Mashup J 22:18
Mashup L 1:17:30
Intermission 1:55:42
Mashup M 2:01:30
5K 2:11:21
Continuing M 2:12:40
Mashup N 2:29:51
Mashup O 3:00:20