I didn’t realize how wonderful and complex this problem is before I wrote the notes…

Wrote my own solution for the drunkards’s walk problem, which turns out to be quite similar to the given solution.

Recently, I’ve been revisiting the Poisson distribution, and honestly — it still feels a bit counterintuitive to me.

Thoughts surrounding Ballot Box problem and the extensions of it.

Recently, while reviewing the formula for the sum of a geometric series, I stumbled upon an unexpectedly elegant connection to a simple probability problem.

Notes on 50 Challenging Problems in Probability by Frederick Mosteller

Notes for Competitive Programming 4. A very good book.

Notes for Guestimathon by Lawrence Weinstein

Dream. Plan. Do.

健身日记

Interesting problem with a much easier solution using mathematical methods.

Easy question but I thought of it in a too difficult way.

I thought of a different approach to the question, not sure if it will work.

A simple dynamic programming question.

A simple problem on identifying prime numbers