how to design?

[RobustDesire@gmail.com]

Hi,

I have to make a C program about Olympic Games System using AVL trees.
In system there are 3 main branches: Swimming,archer y and athletism
Each branches have its subbranches.

I have to hold contestants points in AVL trees.I have not finshed the
design part.For the whole system should i create only one AVL tree or
create an AVL tree for each subbranches?

branche1
--------------------------------------------------------------------
branche2

|
|

|
|
subbranche1 ------------------AVL TREE
subbranche1------------AVL TREE
|
subbranche2 ------------------AVL TREE


or

just one AVL tree?

I wait any suggestions about the design..
Thnks