#define max(a,b) (a)>(b)?(a):(b)
void updateTreeNodeHeight( TTree *tree, TreeNode *aux ){
    if(aux == tree->nil)
        return;
    int a=1,b=1;
   // if( aux->lt != tree->nil )
        updateTreeNodeHeight(tree,aux->lt);
        a = aux->lt->height + 1;
   // if( aux->rt != tree->nil )
        updateTreeNodeHeight(tree,aux->rt);
        b = aux->rt->height + 1;
    aux->height = max( a , b );

}