This is a really good lecture. (I haven't listened to it all yet, so I'll write an additional review when I finish it.) I live in a rural area where there are no computer academies, so I had no choice but to learn online. Before taking this lecture, it was really hard for me to study on my own as a non-major. I bought several books and listened to various online lectures, but I just followed along and didn't understand it well. However, while listening to this, the parts I had been curious about are being solved so refreshingly. I didn't connect the basic knowledge to how it was actually used, but this lecture is really good at explaining those parts, and it's a great lecture for people who can't go to offline academies. I'll study hard. Thank you so much for making such a good lecture and distributing it cheaply.