It was fun. It's a cpp lecture, but I had no problem solving it in js until the end. I recommend it. I'm applying for the upcoming Naver public recruitment, so I'll write about how much it helped me after the exam. *I just found out, but it's a shame that such a great lecture only has 12 reviews. Even though it's a cpp lecture, there's no problem solving it in other languages, but I think it's better to learn data structures in cpp, but any language doesn't matter for algorithms. I recommend it to other language groups as well.