I only had a vague idea that I wanted to be a developer, but I actually didn't know anything.. I really received a lot of help from the PDF text lectures you gave before you started the video lectures. While reading the PDF at that time, I realized the need for a blog, and I've been running a TIL blog for over a year, and I think it was the best choice I made...ㅠㅠㅠ I also got a lot of help from the video lectures while preparing for the interview. Thank you so much!