Day 29: Bitwise AND
https://www.hackerrank.com/challenges/30-bitwise-and/problem
Recent posts
Day 28: RegEx, Patterns, and Intro to Databases
https://www.hackerrank.com/challenges/30-regex-patterns/problem
Day 27: Testing
https://www.hackerrank.com/challenges/30-testing/problem
Day 26: Nested Logic
https://www.hackerrank.com/challenges/30-nested-logic/problem
Day 25: Running Time and Complexity
https://www.hackerrank.com/challenges/30-running-time-and-complexity/problem