[Haskell-cafe] Fwd: Please help with double recursion

[Dmitri O.Kondratiev]

For some reason, my previous message got truncated, so I repeat it in hope
that it will come complete this time:

---------- Forwarded message ----------
From: Dmitri O.Kondratiev <dokondr at gmail.com>
Date: Sat, May 28, 2011 at 3:47 PM
Subject: Please help with double recursion
To: haskell-cafe at haskell.org


Hello,
I am trying to solve a simple task, but got stuck with double recursion -
for some reason not all list  elements get processed.
Please advice on a simple solution, using plane old recursion :)
*** Task: