I think the one on the first floor is too theoretical ~ listen to me: I used to be afraid of math, too, and I found it annoying to have so many numbers. But when you encounter problems, you should be willing to think first, list the clues on paper and try slowly. But if you think a method is feasible, stick to it according to your idea. Now you can try a difficult problem, and you will have a great sense of accomplishment. Don't think that you can improve by doing this all the time. I never tried. Just master the method, don't take math as pressure!