There were so many CS topics that I had no idea where to start, but studying from the core topics that frequently appear saves a lot of time! I often thought that studying one topic in depth would never end, so I wondered how long I would have to study like this. I was also uncertain about how much I should answer. ㅠㅠ I decided on keywords for each topic? and studied only that part first, and when I felt like I had studied CS in general, I felt like I could study the minor parts additionally. The visualization explanation part is easy to understand and clean, so I think it would be good if you covered other topics outside of the regular curriculum!