cs Ɨ co @ university of waterloo

Hi, I’m Eason Li.

I like clean notes, combinatorics, algorithms, optimization, puzzles, and badminton.

see notes github

course archive

notes

Some course notes and study resources I made. If something is missing or marked as final-info-only, feel free to email me.

2026 Winter

Phys 234

w Professor Raffi Budakian

cat decoration

2025 Fall

CO 450

w Professor Chaitanya Swamy

hamster decoration

2025 Fall

CS 341

w Professor Trevor Brown

hamster decoration

2025 Spring

CS 350

w Professor Kevin Lanctot

cat decoration

outside class

other things

puzzles

I also enjoy playing and collecting puzzle ideas.

open puzzle folder →