This is a lecture that is overrated. In particular, there are many explanations like 'This is a problem to find **, so the answer is obviously this, right?' and it feels like looking at an answer sheet without explanation. (I understood it because I had a base before, but if I were a beginner, I don't think I would have understood the code progression order at all with that kind of explanation.) Please think about it once more before purchasing the lecture, and although I didn't feel it before, this was an opportunity to feel that the quality of Sina*'s free lectures is quite high, so please refer to it for other test takers.