This is a attempt to provide solutions to the HackerRank problems. To participate log-on to HackerRank. My attempt is to explain the solutions.

THE HACKERRANK INTERVIEW PREPARATION KIT

For other solutions of HackerRank problems, please refer: https://github.com/KushalGH/HackerRank

Mostly, I will be using C# and JavaScript as of now. Later, can think of using Phython and GO.

WARM-UP CHALLENGES

Sock Merchant Problem.

Hackerrank Problem: https://www.hackerrank.com/challenges/sock-merchant
Hackerrank Title: Sock Merchant
Solution: https://github.com/KushalGH/hackerrank_interview_kit/sock_merchant_problem/solution.js 

Counting Valleys Problem.

Hackerrank Problem: https://www.hackerrank.com/challenges/counting-valleys/
Hackerrank Title: Counting Valleys
Solution: https://github.com/KushalGH/hackerrank_interview_kit/counting_valley_problem/CountingValeey.cs 

Jumping on the Clouds.

Hackerrank Problem: https://www.hackerrank.com/challenges/jumping-on-the-clouds/
Hackerrank Title: Jumping on the Clouds
Solution: https://github.com/KushalGH/hackerrank_interview_kit/Jumping_on_the_clouds/Program.cs 

Repeated String.

Hackerrank Problem: https://www.hackerrank.com/challenges/repeated-string/
Hackerrank Title: Repeated String
Solution: https://github.com/KushalGH/hackerrank_interview_kit/004_repeating_string_problem/Program.cs 

Arrays CHALLENGES

005: 2D Array - DS

Hackerrank Problem: https://www.hackerrank.com/challenges/2d-array/
Hackerrank Title: 2D Array - DS
Solution: https://github.com/KushalGH/hackerrank_interview_kit/005_Array_2DArray/Program.cs 

006: Arrays: Left Rotation

Hackerrank Problem: https://www.hackerrank.com/challenges/ctci-array-left-rotation/problem
Hackerrank Arrays: Left Rotation
Solution: https://github.com/KushalGH/hackerrank_interview_kit/006_Array_rotation/Program.cs