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In contest system https://tuymaada2023.contest.codeforces.com using their login and password of the second day the participants can practice and solve unsolved problems and download all tests.
Applications for an appeal on INFORMATICS are accepted until 15-00 July 9 (local time!) by e-mail firstname.lastname@example.org
The appeal will take place from 17-00 July 9 (local time!) according to the schedule. A link to connect will be sent by reply to the application.