Joshua 'Schwa' Gargus <schwa at cc.gatech.edu> wrote:

> from preamble:
> I got a 30x speed improvement on this
> benchmark.
This is impressive!

My change set  proposal1.cs  was not impressive at all, 
not only gave it wrong results, it also slowed down a
slow algorithm. Sorry about that!

Yoshiki Ohshima found a really admireable solution.