a challenge in your pocket (an introduction to brainteasers)
at HackPra in Bochum, Germany
recording at http://www.youtube.com/watch?v=hg7A7YIEWbU
Ange Albertini
January 13, 2013
at HackPra in Bochum, Germany
recording at http://www.youtube.com/watch?v=hg7A7YIEWbU