HackerRank | Practice & Tutorials Solutions

This repository consists of solutions to HackerRank practice and tutorials problems with Java.

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Table Of Contents

• Practices Completed
• Tutorials Completed
• Certificates

Practices Completed

• Java
• Algorithms

Java

Subdomain	Challenge	Difficulty	Score	Solution
Introduction	Welcome To Java!	Essay	3	Welcome To Java!
Introduction	Java Stdin and Stdout I	Essay	5	Java Stdin and Stdout I
Introduction	Java if-Else	Essay	10	Java if-Else
Introduction	Java Stdin and Stdout II	Essay	10	Java Stdin and Stdout II
Introduction	Java Output Formatting	Essay	10	Java Output Formatting
Introduction	Java Loops I	Essay	10	Java Loops I
Introduction	Java Loops II	Essay	10	Java Loops II
Introduction	Java Data Types	Essay	10	Java Data Types
Introduction	Java End Of File	Essay	10	Java End Of File
Introduction	Java static initializer block	Essay	10	Java static initializer block
Introduction	Java int to String	Essay	10	Java int to String
Introduction	Java Date and Time	Essay	15	Java Date and Time
Introduction	Java Currency Formatter	Essay	15	Java Currency Formatter

Algorithms

Subdomain	Challenge	Difficulty	Score	Solution
Warmup	Solve Me First	Essay	1	Solve Me First
Warmup	Simple Array Sum	Essay	10	Simple Array Sum
Warmup	Compare the Triplets	Essay	10	Compare the Triplets
Warmup	A Very Big Sum	Essay	10	A Very Big Sum
Warmup	Diagonal Difference	Essay	10	Diagonal Difference
Warmup	Plus Minus	Essay	10	Plus Minus
Warmup	Staircase	Essay	10	Staircase
Warmup	Mini-Max Sum	Essay	10	Mini-Max Sum
Warmup	Birthday Cake Candles	Essay	10	Birthday Cake Candles
Warmup	Time Conversion	Essay	15	Time Conversion
Implementation	Apple and Orange	Essay	10	Apple and Orange
Implementation	Grading Students	Essay	10	Grading Students

Tutorials Completed

• 30 Days of Code

30 Days of Code

Day	Challenge	Difficulty	Score	Java
0	Hello, World	Easy	30	Hello, World
1	Data Types	Easy	30	Data Types
2	Operators	Easy	30	Operators
3	Intro to Conditional Statements	Easy	30	Intro to Conditional Statements
4	Class vs. Instance	Easy	30	Class vs. Instance
5	Loops	Easy	30	Loops
6	Let's Review	Easy	30	Let's Review
7	Arrays	Easy	30	Arrays
8	Dictionaries and Maps	Easy	30	Dictionaries and Maps
9	Recursion 3	Easy	30	Recursion 3
10	Binary Numbers	Easy	30	Binary Numbers
11	2D Arrays	Easy	30	2D Arrays
12	Inheritance	Easy	30	Inheritance
13	Abstract Classes	Easy	30	Abstract Classes
14	Scope	Easy	30	Scope
15	Linked Lists	Easy	30	Linked Lists
16	Exceptions - String to Integer	Easy	30	Exceptions - String to Integer
17	More Exceptions	Easy	30	More Exceptions
18	Queues and Stacks	Easy	30	Queues and Stacks
19	Interfaces	Easy	30	Interfaces
20	Sorting	Easy	30	Sorting
21	Generics	Easy	30	Generics
22	Binary Search Tree	Easy	30	Binary Search Tree
23	BST Level-Order Traversal	Easy	30	BST Level-Order Traversal
24	More Linked Lists	Easy	30	More Linked Lists
25	Running Time and Complexity	Medium	30	Running Time and Complexity
26	Nested Logic	Easy	30	Nested Logic
27	Testing	Easy	30	Testing
28	RegEx, Patterns, and Intro to Databases	Medium	30	RegEx, Patterns, and Intro to Databases
29	Bitwise AND	Medium	30	Bitwise AND

Certificates

Skill	Test	Difficulty	Certificate
Java	Test	Basic	Certificate