I used to study for coding tests alone, just solving problems endlessly, but my skills weren't improving and I kept going in circles, which gradually weakened my motivation. When I tried to start studying again, I didn't feel confident that I could improve my skills by just solving problems alone as before, and I thought I needed a change, so I decided to take this course. While taking the course, starting from the really fundamental concept of time complexity that I should have been thinking about, I realized there were many things I had been missing, and as I addressed these one by one, even the problems I had solved before looked different, and I think it was really great that I could learn how to think about solution methods!