[Haskell-cafe] Re: Optimization problem

[Bertram Felgenhauer]

I wrote:
> [1] Balancing can be done with the information in the blueprint, and
> mapping back is easily done by doing the transformation on the tree
> in reverse.

I should add that this possibility was the main reason for dealing with
blueprints at all. As Ross Paterson's solution shows, it's possible to
get simpler code without balancing the tree.

regards,

Bertram