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This service is intended for inserting additional test data to the open checking database with the purpose of modelling the data for the chosen exercise and testing the solution.
On these data it is possible to compare results of your solution with the results which return by the author's query.
As service is focused on exercises of 2 and 3 stages, the service is admitted for anyone who has passed through the first rating stage. Testing is available only for exercises that are accessible to user, i.e. earlier the solved or begun exercises.