I completed the course in 5 months. I majored in programming, but I neglected my studies because I didn't understand and wasn't interested in what I learned in school. At one point, I realized that all of this was because my basics weren't solid. I first came across it on YouTube, so I watched the lectures and saw that the professor explained the basics thoroughly, so I signed up for the course, thinking that it would be my last attempt before giving up on programming. At first, I was thinking of doing game programming and wanted to do C++, but I heard the advice that I should learn the basics in C and move on to C so that I would have less trouble in the field later, so I ended up doing C. As I learned the basics one by one, I gradually gained confidence and interest. The lectures were good at pointing out important points and organizing them by unit. They also kept reminding students of important parts in the later lectures so that they wouldn't forget. They also showed us things that could be solved differently even if the results were the same, and helped us understand with many examples. We were able to use our study time more efficiently because we learned the basics one by one, and the important and relatively unused parts of programming well organized. The lectures pointed out important points well and organized them by unit. Also, the important parts were constantly reminded in the later lectures so that the students would not forget them. One thing that is regrettable is that although the lectures are very detailed and thorough, there are parts that I do not understand (of course, I think my understanding is a bit lacking). So I went to the previous lectures and studied again, but even then, when I asked questions about parts that I did not understand, there were sometimes answers that I did not understand clearly. However, excluding these regrettable points, I can say that this was a class that I looked for and listened to by other teachers that dramatically improved the understanding of grammar and computer memory for major students who do not even know the basics. I feel sorry that I did not pay enough for such a great lecture. Thank you so much for the great lecture. I will now go take Professor Hong Jeong-mo's C++ lecture.