It was time to prepare for coding tests, but I felt overwhelmed and didn't know where to start. This lecture was a huge help in establishing a guideline, as it began by identifying exactly which concepts are necessary—the very starting point I was struggling with—and explained the roadmap for moving forward. Of course, it didn't just set the direction; I also appreciated how it covered how to study and the reasoning behind the choices one must make before solving a problem. Thank you for the great lecture. I will continue to study hard.