I have posted some solutions since I’ve started this blog, I realized that some solutions needed appropriate figures. LaTeX is a great tool for describing equations and formula, but it’s not enough. So I’ve searched the Internet and found that MetaPost.
MetaPost is a programming language that I’ve been looking for. I think I can draw simple figures and help you understand the solution more. But now I’m learning MetaPost, it takes some time to be familiar with it.
I’m going to learn MetaPost via
But I have many solutions to post, and I don’t want to waste time. So I’ll post solutions with the pictures I’ve taken at first, and change them into more pretty figures drawn by MetaPost.