Day 29: Bitwise AND
https://www.hackerrank.com/challenges/30-bitwise-and/problem
https://www.hackerrank.com/challenges/30-bitwise-and/problem
https://www.hackerrank.com/challenges/30-regex-patterns/problem
https://www.hackerrank.com/challenges/30-testing/problem
https://www.hackerrank.com/challenges/30-nested-logic/problem
https://www.hackerrank.com/challenges/30-running-time-and-complexity/problem