This Repository Contains Hackerrank Practice Solutions which will be eventually updated as I solve.

• 30 Days of Code

• C Language HackerRank Practice Solutions

• Python HackerRank Practice Solutions

• SQL HackerRank Practice Solutions

• HackerRank-30 Contest

30 Days of Code:

Please Note:

• I came across this nice post. which will make you not to give up.

Day	Challenge	Points	Python Solution
00	Hello,World	30	Solution
01	Data Types	30	Solution
02	Operators	30	Solution
03	Intro to Conditional Statements	30	Solution
04	Class vs. Instance	30	Solution
05	Loops	30	Solution
06	Let's Review	30	Solution
07	Arrays	30	Solution
08	Dictionaries and Maps	30	Solution
09	Recursion 3	30	Solution
10	Binary Numbers	30	Solution
11	2D Arrays	30	Solution
12	Inheritance	30	Solution
13	Abstract Classes	30	Solution
14	Scope	30	Solution
15	Linked List	30	Solution
16	Exceptions- String to Integer	30	Solution
17	More Exceptions	30	Solution
18	Queues and Stacks	30	Solution
19	Interfaces	30	Solution
20	Sorting	30	Solution
21	Generics	30	Solution.cs
22	Binary Search Trees	30	Solution
23	BST Level-Order Traversal	30	Solution
24	More Linked Lists	30	Solution
25	Running Time and Complexity	30	Solution
26	Nested Logic	30	Solution
27	Testing	30	Solution
28	RegEx,Patterns and Intro to Databases	30	Solution
29	Bitwise AND	30	Solution

C Language HackerRank Practice Solutions:

Sub-Topic	Challenge	Solution	Score
Introduction	Hello,World!	Solution	5
Introduction	Playing with Characters	Solution	5
Introduction	Sum and Difference of Two Numbers	Solution	5
Introduction	Functions in C	Solution	10
Introduction	Pointers in C	Solution	10
Conditionals and Loops	Conditional Statements in C	Solution	10
Conditionals and Loops	For Loop in C	Solution	10
Conditionals and Loops	Sum of Digits of Five Digit Number	Solution	15
Conditionals and Loops	Bitwise Operators	Solution	15
Conditionals and Loops	Printing Pattern using Loops	Solution	30
Arrays and Strings	1D Arrays in C	Solution	10
Arrays and Strings	Array Reversal	Solution	20
Arrays and Strings	Printing Tokens	Solution	20
Arrays and Strings	Digit Frequency	Solution	25
Arrays and Strings	Dynamic Array in C	Solution	40
Functions	Calculate the Nth Term	Solution	15
Functions	Students Marks Sum	Solution	20
Functions	Sorting Array of Strings	Solution	40
Functions	Permutations of String	Solution	40
Functions	Variadic Functions in C	Solution	50
Functions	Querying the Document	Solution	60
Structs and Enums	Boxes through a Tunnel	Solution	25
Structs and Enums	Small Triangles,Large Triangles	Solution	30
Structs and Enums	Post Transition	Solution	50
Structs and Enums	Structuring the Document	Solution	60

Python HackerRank Practice Solutions:

Sub-Topic	Challenge	Solution	Score
Introduction	Say "Hello,World!" with Python	Solution	5
Introduction	Python If-Else	Solution	10
Introduction	Arithmetic Operators	Solution	10
Introduction	Python: Division	Solution	10
Introduction	Loops	Solution	10
Introduction	Write a Function	Solution	10
Introduction	Print Function	Solution	20
Basic Data Types	Lists	Solution	10
Basic Data Types	Tuples	Solution	10
Basic Data Types	List Comprehensions	Solution	10
Basic Data Types	Find the Runner-Up Score!	Solution	10
Basic Data Types	Nested Lists	Solution	10
Basic Data Types	Finding the Percentage	Solution	10
Strings	sWAP cASE	Solution	10
Strings	What's Your Name?	Solution	10
Strings	String Split and Join	Solution	10
Strings	Mutations	Solution	10
Strings	Find a String	Solution	10
Strings	String Validators	Solution	10
Strings	Text Alignment	Solution	10
Strings	Text Wrap	Solution	10
Strings	Designer Door Mat	Solution	10
Strings	String Formatting	Solution	10
Strings	Alphabet Rangoli	Solution	20
Strings	Capitalize	Solution	20
Strings	The Minion Game	Solution	40
Strings	Merge the Tools!	Solution	40
Sets	Introduction to Sets	Solution	10
Sets	Set.add()	Solution	10
Sets	Set.discard(), .remove(), .pop()	Solution	10
Sets	Set.union()	Solution	10
Sets	Set.intersection() Operation	Solution	10
Sets	Set.difference() Operation	Solution	10
Sets	Set.symmetric_difference() Operation	Solution	10
Sets	Set Mutations	Solution	10
Sets	The Captain's Room	Solution	10
Sets	Check Subset	Solution	10
Sets	Check Strict Superset	Solution	10
Math	Polar Coordinates	Solution	10

SQL HackerRank Practice Solutions:

Please Note:

• If you want to learn or brush up SQL Basics you can learn from Here --> SQL-Exercises-With-Solutions repository.

Sub-Topic	Challenge	Solution	Score
Basic Select	Revising the Select Query I	MS-SQL Solution	10
Basic Select	Revising the Select Query II	MS-SQL Solution	10
Basic Select	Select All	MS-SQL Solution	10
Basic Select	Select By ID	MS-SQL Solution	10
Basic Select	Japanese Cities' Attributes	MS-SQL Solution	10
Basic Select	Japanese Cities' Name	MS-SQL Solution	10
Basic Select	Weather Observation Station 1	MS-SQL Solution	15
Basic Select	Weather Observation Station 3	MS-SQL Solution	10
Basic Select	Weather Observation Station 4	MS-SQL Solution	10
Basic Select	Weather Observation Station 5	MySQL Solution	30
Basic Select	Weather Observation Staion 6	MS-SQL Solution	10
Basic Select	Weather Observation Staion 7	MS-SQL Solution	10
Basic Select	Weather Observation Staion 8	MS-SQL Solution	15
Basic Select	Weather Observation Staion 9	MS-SQL Solution	10
Basic Select	Weather Observation Staion 10	MS-SQL Solution	10
Basic Select	Weather Observation Staion 11	MS-SQL Solution	15
Basic Select	Weather Observation Staion 12	MS-SQL Solution	15
Basic Select	Higher than 75 Marks	MS-SQL Solution	15
Basic Select	Employee Names	MS-SQL Solution	10
Basic Select	Employee Salaries	MS-SQL Solution	10
Advanced Select	Type of Triangle	MS-SQL Solution	20
Advanced Select	The PADS	MS-SQL Solution	30
Advanced Select	Occupation	MS-SQL Solution	30
Advanced Select	Binary Tree Nodes	MS-SQL Solution	30
Advanced Select	New Companies	MS-SQL Solution	30
Aggregation	Revising Aggregations-The Count Function	MS-SQL Solution	10
Aggregation	Revising Aggregations-The Sum Function	MS-SQL Solution	10
Aggregation	Revising Aggregations-Average	MS-SQL Solution	10
Aggregation	Average Population	MS-SQL Solution	10
Aggregation	Japan Population	MS-SQL Solution	10
Aggregation	Population Density Difference	MS-SQL Solution	10
Aggregation	The Blunder	MySQL Solution	15
Aggregation	Top Earners	MS-SQL Solution	20
Aggregation	Weather Observation Station 2	MS-SQL Solution	15
Aggregation	Weather Observation Station 13	MS-SQL Solution	10
Aggregation	Weather Observation Station 14	MS-SQL Solution	10
Aggregation	Weather Observation Station 15	MS-SQL Solution	15
Aggregation	Weather Observation Station 16	MS-SQL Solution	10
Aggregation	Weather Observation Station 17	MS-SQL Solution	15
Aggregation	Weather Observation Station 18	MS-SQL Solution	25
Aggregation	Weather Observation Station 19	MS-SQL Solution	30
Aggregation	Weather Observation Station 20	MS-SQL Solution	40
Basic Join	Asian Population	MS-SQL Solution	10
Basic Join	African Cities	MS-SQL Solution	10
Basic Join	Average Population of Each Continent	MySQL Solution	10
Basic Join	The Report	MySQL Solution	20
Basic Join	Top Competitors	MS-SQL Solution	30
Basic Join	Olivander's Inventory	MS-SQL Solution	30
Basic Join	Challenges	MS-SQL Solution	30
Basic Join	Contest Leaderboard	MS-SQL Solution	30
Advanced Join	SQL Project Planning	MS-SQL Solution	40
Advanced Join	Placements	MySQL Solution	40
Advanced Join	Symmetric Pairs	MS-SQL Solution	40
Advanced Join	Interviews	MS-SQL Solution	50
Advanced Join	15 Days of Learning SQL	MS-SQL Solution	50
Alternative Queries	Draw the Triangle 1	MySQL Solution	25
Alternative Queries	Draw the Triangle 2	MySQL Solution	25
Alternative Queries	Print Prime Numbers	MS-SQL Solution	40

HackerRank-30 Contest:

Sub-Topic	Challenge	Solution	Score
HackerRank-30	Video Conference	Solution	15