The lecture is good and the materials are great, but Do I really have to use that solution site? The squares are too small and inconvenient The instructor opens the console window and solves the problem there The solution squares seem smaller than the picture size that is uselessly included in the problem I don't know what they are talking about because they put a story in the problem. It's not intuitive, so it took me a while to understand the problem I think it was number 4, the dream thing, but I thought, "Oh, I'm avoiding companies that give problems like this," and skipped it and just listened to the lecture