Java code samples from the HackerRank.com 30 Days of Code Challenge
Challenges
Day 0: Print Hello World! Day 1: Data Types! Day 2: Arithmetic! Day 3: If-Else Statements! Day 4: Logical Operators + 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 + More Review! Day 12: Inheritance! Day 13: Abstract Classes! Day 14: All about Scope! Day 15: Linked List! Day 16: Sorting! Day 17: Exceptions! Day 18: Queues & Stacks! Day 19: Interfaces! Day 20: Review + More String Methods! Day 21: Generics! Day 22: Binary Search Trees Day 23: Review+Binary Trees! Day 24: More Review + More Linked Lists! Day 25: Running Time and Complexity! Day 26: Testing Part I + Implementations! Day 28: RegEx, Patterns, and Intro to Databases! Day 29: Look at Everything We've Learned!
I was able to finish all of the challenges, with a perfect score. I tied for 1st place (724th to finish). Only 1734 people were able to finish with a perfect score, out of 26250 that started the challenge.