Part of https://cdkrot.me/teaching/
Note: github pdf reader is not great, I recommend download files to your device (click download button in the top right corner).
Logic Intro Lecture: link
Games Theory Intro (Matrix Games, auctions, elections, etc.): link
Suffix Automaton: link
Counting Primes In N^2_3, Linear Sieve, Mobius And Else: link
Splay Tree (inc.): link