This paper was part of the Workshop on Unconventional Computational Problems held during the conference.

"The purpose of the workshop is to explore a less developed branch of unconventional computing, where the attribute 'unconventional' characterizes the computational paradigm or problem to be solved, rather than the model or means employed to address a conventional problem. This research direction is motivated by the increasing number of real-world problems we are facing today and that cannot be formulated in the rigid framework imposed by a classical Turing machine."--From the conference program.