As a beginner who was new to coding tests, I had a lot of concerns before starting. It was daunting to start solving problems without a basic knowledge, and I was at a loss as to how to approach new types of problems. However, in this lecture, Dingko explained the basics step by step and taught me a very systematic approach to real-world problems, which greatly lowered the barrier to entry for coding tests. In particular, thanks to his easy explanation of key concepts, I was able to follow even difficult content without any burden. Also, it was great that there was always a video visualizing the problems solved at the end of the lecture!! I highly recommend this to anyone who is trying to start coding tests.