• Test doesn't meet precondition of task


I would like to give some feedback about very first task.

The task has precondition 0 < |X| < 1000 but one of the tests is checkio([1000000,999999,1999999,2000000,2000000]) I think this is not fair Please change tests or precondition.

From: https://www.checkio.org/mission/non-unique-elements/solve/


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