I will write from the perspective of a major. I have learned many languages such as C, C++, Python, and Java in school classes and studied on my own. As a person who has studied, Professor Kim Young-han's lectures are definitely easy to understand. I recommend it to those who are listening to it for the first time, and I think it would be better for majors to not listen to it and study it more deeply separately. If you are studying it for the first time and do not understand the data structure, be sure to draw the structure in memory. It will stay in your memory longer and will be easier to understand.