Facebook has announced its 2011 Hacker Cup, a competition in which participants will be asked to solve algorithmic-based problem statements, with answers rated on speed and accuracy. The contest will consist of three rounds during which the participants will be narrowed down to 25. This final group will then be flown to Facebook headquarters to participate in a final round which will determine a winner.<br /> According to Facebook?s announcement;<br /> ?Hacking is a central part of Facebook's culture. Whether we're building the next big product at one of our Hackathons or creating a smarter search algorithm we're always hacking to find a better way of doing things.?<br /> Registration for the event begins on 20 December 2010, with a 72-hour qualification round taking place on 7 January at 0:00 UTC.</p>