Hello. I skipped the beginner course and started with the intermediate course. While taking the intermediate course, it was a lecture that reviewed the parts that I was confused about while studying alone. I think solving various problems during the lecture was very helpful. So I was a little disappointed that there weren't many difficult problems like the ones I solved at the end. Still, I think it's a really good lecture for solidifying the basics! Thank you for the lecture~ (I sent an email requesting the cheat sheet before.)