Prior to importing solutions contributed to Richard Heathfield's K&R2 solutions site, a good-faith attempt was made to confirm that each contributor was willing for their contribution to be imported into a comp.lang.c wiki under GNU FDL with code snippets in the public domain.
To this end, emails requesting confirmation were sent. Some bounced and some were not replied to, but no one who responded denied permission. The import was eventually made assuming the implicit permission of those we were unable to contact. If you were an original contributor and wish to object to this, you can let one of the administrators of the wiki know.