import unittest

class Test(unittest.TestCase):
    def test_izpuscaji(self):
        self.assertEqual([], izpuscaji([]))
        self.assertEqual([3], izpuscaji([3]))
        self.assertEqual([3], izpuscaji([3, 1]))
        self.assertEqual([3], izpuscaji([3, 1, 2, ]))
        self.assertEqual([3], izpuscaji([3, 1, 2, 5]))
        self.assertEqual([3, 1], izpuscaji([3, 1, 2, 5, 1]))
        self.assertEqual([3, 0, 1, 2], izpuscaji([3, 1, 2, 4, 0, 1, 2, 2, 3]))

    def test_NEOBVEZNO_nazaj(self):
        self.assertEqual([30], nazaj([30]))
        self.assertEqual([18, 30], nazaj([23, 18, 30]))
        self.assertEqual([5, 18, 30], nazaj([5, 23, 18, 30]))
        self.assertEqual([5, 8, 10, 12, 18, 30], nazaj([7, 5, 8, 10, 16, 12, 23, 18, 30]))


if __name__ == "__main__":
    unittest.main()