def test_4321(self): seq = [4, 3, 2, 1] self.assertEqual(answer4_2(seq), '1')
def test_1324(self): seq = [1, 3, 2, 4] self.assertEqual(answer4_2(seq), '2')
def test_3214(self): seq = [3, 2, 1, 4] self.assertEqual(answer4_2(seq), '3')
def test_421356(self): seq = [4, 2, 1, 3, 5, 6] self.assertEqual(answer4_2(seq), '20')
def test_12345678910(self): seq = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10] self.assertEqual(answer4_2(seq), '1')
def test_52981(self): seq = [5, 2, 9, 8, 1] self.assertEqual(answer4_2(seq), '6')
def test_59821(self): seq = [5, 9, 8, 2, 1] self.assertEqual(answer4_2(seq), '6')