I'm angry after listening to the lecture... Before listening to this lecture, when I was studying... Those stupid things...ㅠㅠ If I had listened to this lecture 5 years earlier... I think I would have been told that I was going to do some programming. If I had listened to this lecture 10 years earlier... My life would have changed.. It was a lecture like a ray of light that guided a wandering lamb to the right path. Thank you for always giving the best lectures.