Quote from the announcement:
"IDI Open is a contest for teams of programmers of all skill levels, from those who are taking their first course in programming, to mad skill code monkeys. Each team can consist of up to three people, using one computer to solve the given problems. The programming tasks in the contest is similar to those found in NCPC (NM i programmering) and TopCoder, but the simplest problems in the set will be easier. You will be asked to write programs that takes an input problem definition and calculates a solution. The programs may be in Java, C or C++. Usually, there are around 9 problems, some easy, some medium, and some hard"
Note: IDI is the Department of Computer and Information Science at Norwegian University of Science and Technology (NTNU) here in Trondheim