FUN with Algorithms is a three-yearlyconference that aims at attracting works which, besides a deep and interesting algorithmic content, also present amusing and fun aspects, are written with a keen wit, and are presented in a lively way. FUN isactuallyone ofthe mainmovingwheelsbehind mostofthe bestscienti?c results, and in a sense this conference answers to the unconfessed need of having a place where we can present the most lighthearted part of our work without sacri?cing precision and rigor. The 5th International Conference on Fun with Algorithms (FUN 2010) was held at Hotel Continental...