Hacker Rank Programming Practice in 30 days:

• Day 0: Hello, World.
• Day 1: Data Types
• Day 2: Operators
• Day 3: Intro to Conditional Statements
• Day 4: Class vs. Instance
• Day 5: Loops
• Day 6: Let's Review
• Day 7: Arrays
• Day 8: Dictionaries and Maps
• Day 9: Recursion
• Day 10: Binary Numbers
• Day 11: 2D Arrays
• Day 12: Inheritance
• Day 13: Abstract Classes
• Day 14: Scope
• Day 15: Linked List
• Day 16: Exceptions - String to Integer
• Day 17: More Exceptions
• Day 18: Queues and Stacks
• Day 19: Interfaces
• Day 20: Sorting
• Day 21: Generics
• Day 22: Binary Search Trees
• Day 23: BST Level-Order Traversal
• Day 24: More Linked Lists
• Day 25: Running Time and Complexity
• Day 26: Nested Logic
• Day 27: Testing
• Day 28: RegEx, Patterns, and Intro to Databases
• Day 29: Bitwise AND