[dyn!o]

"I know what the algo do"
That's strange because in the first post you have written:

"Someone recognize this algo and it is possible to reverse it?"
So it looks you don't know (at least for me).

I suggested you to recognize it first, but now you amazed me totally by writting the pseudo code + claiming you "recognize this algo" and at the same time.... asking for help. I'm a little bit lost. You know what does the algorithm do and you don't know how to "reverse it"?

Regards.