From the site:

What is Insomnia? Insomnia a coding contest in which every person, anywhere in the world can participate. Insomnia will test the programming skills as well as problem solving capabilities of the participating teams. You are required to create solutions to problems mentioned on the Problems page. Create your solution in C, C++ or Java and upload it on the Upload Files page. The program will be automatically evaluated and the result of submission will be available on the Results page.

Details of the Main Round:

The main round will consists of two independent phases.

• The first phase will be on 20th March. It will be a Speed Coding Round of 4 hrs.
• The second phase will be on 21st March. It will be a Thought Coding Round of 12 hrs.
• Teams of atmost 2 people are allowed.

Insomnia has attracted huge participation across the years, with teams pouring in from around the country to be a part of the battle of insomniacs, vying for the ultimate prize. Awards and glory await the champions; only the worthy shall survive the night. So, gear up and get ready to set your foot into the biggest challenge of the programming world!