HackerRank

These are my solutions and notes to HackerRank coding problems.

Programming Problems

Selected problems by domain

Bash Scripting

	Coding Problem	Solution	Level	Notes
1.	Let's Echo	bash-tutorials-lets-echo.sh	Easy	-
2.	Looping and Skipping	bash-tutorials---looping-and-skipping.sh	Easy	-
3.	A Personalized Echo](https://www.hackerrank.com/challenges/bash-tutorials---a-personalized-echo/problem)	bash-tutorials---a-personalized-echo.sh	Easy	-todo-
4.	Looping with numbers	bash-tutorials---looping-with-numbers.sh	Easy	-todo-
5.	The World of Numbers	bash-tutorials---the-world-of-numbers.sh	Easy	-todo-
6.	Comparing Numbers	bash-tutorials---comparing-numbers.sh	Easy	-todo-
7.	Getting started with conditionals	bash-tutorials---getting-started-with-conditionals.sh	Easy	-todo-
8.	More on conditionals	bash-tutorials---more-on-conditionals.sh	Easy	-todo-
9.	Arithmetic Operations	todo	Medium	-todo-
10.	Compute the Average	todo	Medium	-todo-
11.	Cut #1	todo	Easy	-todo-

Structured Query Language (SQL)

	Coding Problem	Solution	Level	Notes
1.	Revising the Select Query I	todo
2.	Revising the Select Query II	todo
3.	Select All	todo
4.	Select By ID	todo
5.	Japanese Cities' Attributes	todo
6.	Japanese Cities' Names	todo
7.	Weather Observation Station 1	todo
8.	Weather Observation Station 3	todo
9.	Weather Observation Station 4	todo
10.	Weather Observation Station 5	todo
11.	Weather Observation Station 6	todo
12.	Weather Observation Station 7	todo
13.	Weather Observation Station 8	todo
14.	Weather Observation Station 9	todo
15.	Weather Observation Station 10	todo
16.	Weather Observation Station 11	todo
17.	Weather Observation Station 12	todo
18.	Higher Than 75 Marks	todo
19.	Employee Names	todo
20.	Employee Salaries	todo
21.	The Blunder	todo
22.	Top Earners	todo
23.	Weather Observation Station 2	todo
24.	Weather Observation Station 13	todo

Selected problems by tutorial

30 Days of Code

Coding Problem	Solution
Day 0: Hello, World	C++
Day 1: Data Types	C++
Day 2: Operators	C++
Day 3: Intro to Conditional Statements	C++
Day 4: Class vs. Instance	C++
Day 5: Loops	C++
Day 6: Let's Review	C++
Day 7: Arrays	C++
Day 8: Dictionaries and Maps	C++
Day 9: Recursion 3	C++
Day 10: Binary Numbers	C++
Day 11: 2D Arrays	C++
Day 12: Inheritance	C++
Day 13: Abstract Classes	C#
Day 14: Scope	C++
Day 15: Linked List	C++
Day 16: Exceptions - String to Integer	C++
Day 17: More Exceptions	C++
Day 18: Queues and Stacks	C++
Day 19: Interfaces	C++
Day 20: Sorting	Python
Day 21: Generics	C++