HackerRank-solutions

My Java solutions to HackerRank challenges

Java

Domain	Subdomain	Challenge	Difficulty	Solution
Java	Introduction	Welcome to Java!	Easy	Solution.java
Java	Introduction	Java Stdin and Stdout I	Easy	Solution.java
Java	Introduction	Java If-Else	Easy	Solution.java
Java	Introduction	Java Stdin and Stdout II	Easy	Solution.java
Java	Introduction	Java Output Formatting	Easy	Solution.java
Java	Introduction	Java Loops I	Easy	Solution.java
Java	Introduction	Java Loops II	Easy	Solution.java
Java	Introduction	Java Datatypes	Easy	Solution.java
Java	Introduction	Java End-of-file	Easy	Solution.java
Java	Introduction	Java Static Initializer Block	Easy	Solution.java
Java	Introduction	Java Int to String	Easy	Solution.java
Java	Introduction	Java Data and Time	Easy	Solution.java
Java	Introduction	Java Currency Formatter	Easy	Solution.java
Java	Strings	Java Strings Introduction	Easy	Solution.java
Java	Strings	Java Substring	Easy	Solution.java
Java	Strings	Java String Compare	Easy	Solution.java
Java	Strings	Java String Reverse	Easy	Solution.java
Java	Strings	Java Anagrams	Easy	Solution.java
Java	Strings	Java String Tokens	Easy	Solution.java
Java	Strings	Pattern Syntax Checker	Easy	Solution.java
Java	Strings	Java Regex	Medium	Solution.java
Java	Strings	Java Regex 2 - Duplicate Words	Easy	Solution.java

30 Days of Code

Domain	Subdomain	Day	Challenge	Difficulty	Solution
Tutorials	30 Days of Code	0	Hello, World	Easy	Solution.java
Tutorials	30 Days of Code	1	Data Types	Easy	Solution.java
Tutorials	30 Days of Code	2	Operators	Easy	Solution.java
Tutorials	30 Days of Code	3	Intro to Conditional Statements	Easy	Solution.java
Tutorials	30 Days of Code	4	Class vs. Instance	Easy	Solution.java
Tutorials	30 Days of Code	5	Loops	Easy	Solution.java
Tutorials	30 Days of Code	6	Let's Review	Easy	Solution.java
Tutorials	30 Days of Code	7	Arrays	Easy	Solution.java
Tutorials	30 Days of Code	8	Dictionaries and Maps	Easy	Solution.java
Tutorials	30 Days of Code	9	Recursion	Easy	Solution.java

Cracking the Coding Interview

Domain	Subdomain	Topic	Challenge	Difficulty	Solution
Tutorials	Cracking the Coding Interview	Data Structures	Arrays: Left Rotation	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Strings: Making Anagrams	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Hash Tables: Ransom Note	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Linked Lists: Detect a Cycle	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Stacks: Balanced Brackets	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Queues: A Tale of Two Stacks	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Trees: Is This a Binary Search Tree?	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Heaps: Find the Running Median	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Tries: Contacts	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Sorting: Bubble Sort	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Sorting: Comparator	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Merge Sort: Counting Inversions	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Binary Search: Ice Cream Parlor	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	DFS: Connected Cell in a Grid	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	BFS: Shortest Reach in a Graph	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Time Complexity: Primality	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Recrusion: Fibonacci Numbers	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Recursion: Davis' Staircase	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	DP: Coin Change	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Bit Manipulation: Lonely Integer	Easy	Solution.java

10 Days of Statistics

Domain	Subdomain	Day	Challenge	Difficulty	Solution
Tutorials	10 Days of Statistics	0	Mean, Median, and Mode	Easy	Solution.java
Tutorials	10 Days of Statistics	0	Weighted Mean	Easy	Solution.java
Tutorials	10 Days of Statistics	1	Quartiles	Easy	Solution.java
Tutorials	10 Days of Statistics	1	Interquartile Range	Easy	Solution.java
Tutorials	10 Days of Statistics	1	Standard Deviation	Easy	Solution.java
Tutorials	10 Days of Statistics	2	Basic Probability	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	2	More Dice	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	2	Compound Event Probability	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	3	Conditional Probability	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	3	Cards of the Same Suit	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	3	Drawing Marbles	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	4	Binomial Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	4	Binomial Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	4	Geometric Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	4	Geometric Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Poisson Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Poisson Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Normal Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Normal Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	6	The Central Limit Theorem I	Easy	Solution.java
Tutorials	10 Days of Statistics	6	The Central Limit Theorem II	Easy	Solution.java
Tutorials	10 Days of Statistics	6	The Central Limit Theorem III	Easy	Solution.java
Tutorials	10 Days of Statistics	7	Pearson Correlation Coefficient I	Easy	Solution.java
Tutorials	10 Days of Statistics	7	Spearman's Rank Correlation Coefficient	Easy	Solution.java
Tutorials	10 Days of Statistics	8	Least Square Regression Line	Easy	Solution.java
Tutorials	10 Days of Statistics	8	Pearson Correlation Coefficient II	Multiple Choice	Solution.txt

Algorithms

Domain	Subdomain	Challenge	Difficulty	Solution
Algorithms	Warmup	Solve Me First	Easy	Solution.java
Algorithms	Warmup	Simple Array Sum	Easy	Solution.java
Algorithms	Warmup	Compare the Triplets	Easy	Solution.java
Algorithms	Warmup	A Very Big Sum	Easy	Solution.java
Algorithms	Warmup	Diagonal Difference	Easy	Solution.java
Algorithms	Warmup	Plus Minus	Easy	Solution.java
Algorithms	Warmup	Staircase	Easy	Solution.java