I have completed a little over 50% of the course. When I first listened to the first part, I didn't feel much, but now I'm watching and learning with great interest. Before solving problems on various online coding test sites, if you learn various algorithms through this lecture and then take on the challenge, it will be a much more enjoyable challenge. I recommend it to many people. They say that algorithms are easily forgotten if you don't use them for a while, but fortunately, this lecture has no deadline, so if you study hard this time and forget them, you can look at them again in a few years, so I think it's really fortunate.