019f8fd211
git-subtree-dir: users/wpcarro git-subtree-mainline:464bbcb15cgit-subtree-split:24f5a642afChange-Id: I6105b3762b79126b3488359c95978cadb3efa789
33 lines
966 B
Python
33 lines
966 B
Python
import unittest
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################################################################################
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# Solution
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################################################################################
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# find_repeat :: [Int] -> Int
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def find_repeat(xs):
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n = len(xs) - 1
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return sum(xs) - ((n**2 + n) / 2)
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################################################################################
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# Tests
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################################################################################
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class Test(unittest.TestCase):
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def test_short_list(self):
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actual = find_repeat([1, 2, 1])
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expected = 1
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self.assertEqual(actual, expected)
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def test_medium_list(self):
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actual = find_repeat([4, 1, 3, 4, 2])
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expected = 4
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self.assertEqual(actual, expected)
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def test_long_list(self):
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actual = find_repeat([1, 5, 9, 7, 2, 6, 3, 8, 2, 4])
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expected = 2
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self.assertEqual(actual, expected)
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unittest.main(verbosity=2)
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