Hi, there's a movie I want to watch that I've seen before, but I don't remember its name. In fact, all I can remember about this movie is that its about some boy genious who ends up going to genious school, and he meets another kid there who is called the "Mathmagician", who is some kid who is a mathematical magician. He can count things incredibly fast, and for example, if he sees a tree, he can count all the leaves on the tree almost immediately.

Any clues??? Thanks for the help in advance