The practice contest started on Friday, January 18 (7:00 amUTC) and lasted till Monday, January 21 (10:00 pmUTC). Participants could begin working on the problems at any time during this period. From the moment they first saw the test, they had exactly three hours to work on the problems and type in their answers (explanations were not required).
The contest consisted of two problems: an interactive problem and a multimedia one.
As the contest was held for practice purposes only, its results will not be published.
Problems & Answers: in 