I started solving the problem right away without clearly defining it... Also, I'm confused because the code explained in class is different from the code in the materials.

Very good

I'm trying to study algorithms properly, so I'm taking a lecture that focuses on concepts and is aimed at beginners, but it's not a lie, it gets harder as it goes on. The explanations are poor, so I don't understand, but I just do it, solve it, and it's over. Is this the right way...? There were many times when I didn't understand the lecture and used other blogs or GPT to understand it. It feels like that's more helpful than taking this lecture.