My solutions of different Hackerrank challenges, practicing, and tutorials.

• 30 Days of Code

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Versions of used programming languages:

• Java 14;
• Kotlin 1.3.71;
• Typescript 3.9;
• Scala 2.12;
• Elixir 1.10;
• Bash 5.0.

SQL solutions was developed using PostgreSQL

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30 Days of Code

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