Created
June 30, 2015 15:45
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| def test_solution(): | |
| assert solution([]) == None | |
| assert solution([1]) == 1 | |
| assert solution([1, 2]) == None | |
| assert solution([1, 2, 3]) == None | |
| assert solution([1, 2, 1]) == 1 | |
| assert solution([1, 2, 1, 2]) == None | |
| if __name__ == "__main__": | |
| test_solution() |
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