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Preparing test cases is a vital step in a programming contest. Creating all test cases manually by hand is hard and error-prone, so they should be generated by programs. There have been several attempts at creating a framework for test cases generation, that involve writing a generator program that generates the test cases, and a validator program that validates whether the produced test cases conform to the constraints. This paper proposes a simpler yet robust framework, called tcframe, fordoi:10.15388/ioi.2015.06 fatcat:qnvw2kiwnfcejdfigumvwswiqe