25 of the worlds best hackers have been brought together by Facebook for their 2nd annual 'Hacker Cup' held at their offices in Menlo Park. An initial registration of 8000 applicants was reduced to just 25 for the main competition. The 25 men hail from across the globe including Russia, South Korea, Poland, Japan and Germany.

All these guys were flown to California as only one entrant is actually from the USA. They have three hours to solve three problems and are judged on accuracy and speed. In the previous competition only 2 people completed all three tasks and only 15 completed just 1. 

This is what David Alves of Facebook said when the competition: Hacking is core to how we build at Facebook. Whether we