17 hours and 18 minutes... It's a long lecture, but I finally finished it. I compared several other lectures before applying for the lecture, and it was the right decision. The presentation materials were also good to study. Before taking this lecture, I watched the Java version of Life Coding and practiced implementing various functions using the concepts, but there were many parts that I didn't know. There were definitely limits to solving it through Internet searches, and there were many parts that were lacking. I think I was able to understand those parts that were lacking through this lecture, and I learned a lot of new things because the explanations were constantly related to memory. However, I think the contents that were explained were very good, but one thing that was disappointing was that the parts that were explained often did not flow smoothly, so I had to put in more effort to understand them. However, it is worth giving it 5 stars. Thanks to instructor Park Mae-il, I was able to get one step closer to Java. Thank you!