If you missed a round or didn't get enough points (25% of the total points of the round and 50% of the total points of all rounds) to pass a round you should do the extra basic exercises in order to complete the basic exercises and pass the course. The exercises are the same as in the actual rounds but the initial contents of the data structures differs. Extra basic exercises are treated separately from actual basic exercises so the different course ID r98 must be used (you only have to worry about that if you use Email to communicate with TRAKLA). Registration to this course is not neccessary. Points from actual basic exercises and extra basic exercises are added after deadline(s) has passed. For more information refer to news group opinnot.tik.dsaa and course home page.
Pick up an exercise by giving your study book number (SBN) and selecting the exercise number with following WWW form. There are also demo exercises available which do not influence your grade.