Read the official rules here.

Here’s the fine print:

NO ADD’L PUR. OR PYMNT NEC. TO ENTER OR WIN. Enter in person by 11:00am PST on 11/2/15. Must be 18+, paid attendee, and present at QuickBooks Connect 2015 Hackathon in San Jose, CA during 11/1-11/2 to participate. For complete details and prize descriptions see Official Rules. Void where prohibited. Sponsor: Intuit Inc., Mountain View, CA.