I bought many algorithm books and lectures. However, I got tired of them before I could even get through half of them. There were many ways to solve problems and answers, but there were no lectures that explained the process of getting there. They only said that this algorithm would be used in this case, and the rest of the course had to be filled in by the students themselves. As time went by, but the parts that needed to be learned were not filled in quickly, so I started to get bored quickly. However, after watching this lecture with its sophisticated illustrations and detailed explanations, I was sucked in and the attendance rate was already over 50%. Even though I only watched it during my short commute to and from work. Of course, I reviewed the content during lunch after watching the lecture so that I wouldn't forget it. I think the biggest reason I kept watching it was because it gave me a feeling of understanding the more I watched it. It pointed out parts that were easy to miss that other lectures didn't teach, and it led to a conclusion about why this method was right, so I felt like I was finally realizing parts that I didn't fully understand until now, which made me want to finish the course quickly. Actually, I don't like Python as a language. I've only used strongly typed languages like C++ and TypeScript, so I'm not familiar with the 'Pythonic' grammar, but after watching the lecture, Python seems much easier to understand and the code is more concise, so I'm going to prepare for the coding test with Python. I want to quickly finish it and move on to the problem-solving stage. Thank you for creating a great lecture!