This notebook was prepared by Donne Martin. Source and license info is on GitHub.

Challenge Notebook

Constraints

See the HackerRank problem page.

Test Cases

See the HackerRank problem page.

Algorithm

Refer to the Solution Notebook. If you are stuck and need a hint, the solution notebook's algorithm discussion might be a good place to start.

Code

In [ ]:
class Solution(object):

    def max_xor(self, lower, upper):
        # TODO: Implement me
        pass

Unit Test

The following unit test is expected to fail until you solve the challenge.

In [ ]:
# %load test_maximizing_xor.py
import unittest


class TestMaximizingXor(unittest.TestCase):

    def test_maximizing_xor(self):
        solution = Solution()
        self.assertEqual(solution.max_xor(10, 15), 7)
        print('Success: test_maximizing_xor')


def main():
    test = TestMaximizingXor()
    test.test_maximizing_xor()


if __name__ == '__main__':
    main()

Solution Notebook

Review the Solution Notebook for a discussion on algorithms and code solutions.