This lecture is very suitable for the title Introduction to Coding Test. I think it would be great for those who are new to coding tests, are feeling lost, or have not done coding tests for a long time and have lost their sense of humor. Rather than explaining the code in detail, it is very detailed and clear because it helps you understand the problem situation visually and explains the code in debug mode. As a major, it was a great help for me in coding tests and helped me see the big picture! And I really like that on the Deco Channel, if you upload the code you solved, you get direct code feedback!!