This is a really good lecture. I didn't prepare for the coding test before, but I had a problem that I couldn't solve in the past. After studying while listening to the lecture, I was able to solve it easily, so I felt the benefit of the lecture even more. And it was very helpful to learn how to approach the problem strategically. I prepared for the coding test in a hurry, but it was really good to quickly look at it in detail. I like that the explanation is easy to understand.