I graduated from college with a degree in computer science, but I couldn't even properly sum up numbers from 1 to 10. However, after meeting Professor Kim Tae-won, I was able to solidify my basics! However, I had to review other problems on my own while watching the lectures, but I regret not being able to devote much time to self-studying algorithms because I was focusing on other personality and qualification studies. ㅠ! The lectures were really good. Originally, I couldn't even solve level 1 of the Programmers standard.. After taking this lecture, I was able to solve up to level 2^^ ㅎㅎ I think it's important to do things on your own from 3. I didn't get into Samsung Electronics, which was my initial goal, but I got accepted into another company I wanted to work for and got a job. :) I was grateful that you always kindly answered my questions through email and here at Infraon. ^^ Stay healthy, teacher~~~! + One tip: I recommend learning the C++ language separately. If you learn multimap, unordered map, etc., you can approach difficult problems. Algorithms are important, but learning the basic C++ language is also important!