In the past, whenever I tried to solve problems, the hardest part was that even after reading the problem, I couldn't figure out which algorithm I should use to solve it. Because of that, I often wandered around without a clear direction, and many times I felt overwhelmed even before starting. However, this lecture was great because it didn't just show the correct answers; it clearly explained why you should approach certain types of problems in a specific way and what criteria to use when selecting an algorithm. Thanks to this, I've gradually developed a set of standards for looking at problems, and I find myself relying on blind intuition much less than before. Another thing that left an impression was the insight gained from real-world industry experience. It wasn't just a lecture about solving problems; being able to hear how one actually thinks and makes judgments was even more helpful. Above all, I really liked how complex problems were explained using diagrams to make them as easy to understand as possible. Even confusing concepts were explained in a way that I could visualize them in my head, so there were almost no problems we solved together that I moved past without fully understanding. Overall, it was a lecture where I could learn the actual method of problem-solving, and I am very satisfied because it helped me organize many of the parts I felt stuck on while studying alone.