Introducing CMS: A Contest Management System

We present Contest Management System (CMS), the free and open source grading system that will be used in IOI 2012 .C MS has been designed and developed from scratch, with the aim of providing a grading system that naturally adapts to the needs of an IOI-like competition, including the team selection processes. Particular care has been taken to make CMS secure, robust, developed for the community, extensible, easily adaptable and usable.