A Hackathon is a collaboration of programmers and designers to code, design and build innovative solutions to real life problems, through extensive coding in a short time duration. Hackathons are the biggest thing to happen to education since the rise of the Internet. See this for a good explanation.
Your only constraint is: You only have 30 hours.

Yes, beside coding there are various workshops, events and marvellous mentors to help you out in boosting up. Whether you're making your first website, hacking Oculus Rift to censor real world ads, or creating something fun; Hack#404 is for you. We will allow you to show your coding skills without getting worried about any mortal needs. We will take care of everything.

It is a 30 hours hackthon in which, teams have to work on their product each team consist of maximum three members(Under 24). At last ideas are pitched to the mentors best ideas will be taked up for investment and incubation.

Registration Link : http://goo.gl/forms/wNXALArijd

• Usefulness
  5 Points
• Innovation
  5 points
• Design
  5 points
• Technical Difficulty
  5 points
• Bonus
  2 points - for anything else judges find impressive