It's a lecture. The quality is the best in a compact size. It was a lecture that I could feel the scent of an expert. It is a masterpiece that contains the most essential contents, explanations, and concepts in a small amount of lectures. I'm lucky that I can take this lecture for 44,000 won. It's much better than most coding boot camp lectures. It's really great that you teach excellent methods to organize and manage codes neatly and efficiently. I can feel your inner strength.