Facebook's hacker cup is algorithmic programming contest held by Facebook. The registration for this event is already open, sign up here to register for this contest. First prize winner will get 5000USD, 2000USD will be awarded to first runner up and second runner up will get 1000USD. 100$ will be awarded to those who finish fourth till 25th.
Here is the full detail of the event, courtesty Facebook:
The competition commences with a 72-hour Qualification Round on January 20, 2012 at 4:00 PM PT and ends on January 23, 2012 at 4:00 PM PT. All registered competitors will be presented with three problems. Every competitor who correctly solves at least one problem will advance to Online Round 1.Source
Online Round 1 will last 24 hours from January 28, 2012 at 10:00 AM PT and ends on January 29, 2012 at 10:00 AM PT. To advance to Online Round 2, participants must solve at least one problem correctly. If more than 500 people solve at least one problem correctly, then the top 500 participants will advance, as well as everyone else who answered the same number of questions correctly as the 500th-place contestant.
Online Round 2 will last three hours from February 4, 2012 at 1:00 PM PT and end February 4, 2012 at 4:00 PM PT. The competitors will have three hours to solve the presented problem sets. The top-scoring 100 participants from Online Round 2 will receive an official Hacker Cup t-shirt. The top-scoring 100 competitors from Online Round 2 will be notified via email that they have advanced to Online Round 3.
Online Round 3 will last three hours from February 11, 2012 at 1:00 PM PT and end February 11, 2012 at 4:00 PM PT. The 100 competitors will have three hours to solve the presented problem sets. The top-scoring 25 competitors from Online Round 3 will be notified via email that they have advanced to the final round at Facebook.
Facebook will fly the top-scoring 25 competitors to Menlo Park, California, for the final round of competition on March 17, 2012, where they'll receive some great cash prizes and other awesome goodies. Out of these 25 finalists, one champion will emerge and be immortalized on the Hacker Cup trophy. Finalists will be responsible for obtaining their own entry visa before arrival in the USA; however, Facebook will reimburse the finalist for any visa application fee and up to $100 USD in travel expenses incurred in obtaining the visa. Facebook will not reimburse any fees or expenses related to obtaining a passport.
Want to get ahead of the competition? Try your hand at the problems from last year's qualification round here and keep an eye on the Hacker Cup Page for more details and announcements as the January 20th qualification round approaches.