It was tough. I feel bad about paying nearly 150,000 won for such a poor lecture, so I have to leave a comment. The code completion rate should be at the very least, and you should at least remove the lectures that get lost in the middle.. Half of the lectures are looking for errors in the code you wrote yourself. And why did you target intermediate or higher level students with such basic content? At first, I wondered, But I came to understand that the instructor's bad habits can have a negative impact on beginners or novices, So I agreed. I listened to the end with anticipation, hoping to get my 150,000 won back... It's really a waste of money....