HackerrankPracticeProblems

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HackerrankPracticeProblems

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Solutions to Hackerrank.com practice problems in SQL, JAVA, C++ , Python, Data Structures and Algorithms.

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# Hackerrank Practice Problems

- This repository contains solutions to [Hackerrank](https://Hackerrank.com) practice problems in SQL, C++, Java Python and Problem Solving (Data Structures and Algorithms).
- If you are interested in adding more Hackerrank problem solutions, please feel free to contribute.
- If you feel this repo is helpful for you, please do star it.
- Kindly follow [CODE_OF_CONDUCT.md](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/CODE_OF_CONDUCT.md) and [CONTRIBUTING.md](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/CONTRIBUTING.md) before contributing.
- Happy Coding 🥳!

<img src="https://img.shields.io/badge/language-MySQL-orange.svg"> <img src="https://img.shields.io/badge/language-JAVA-orange.svg"> <img src="https://img.shields.io/badge/language-C++-orange.svg"> <img src="https://img.shields.io/badge/language-Python-orange.svg"> [![GitHub license](https://badgen.net/github/license/Naereen/Strapdown.js)](https://github.com/Naereen/StrapDown.js/blob/master/LICENSE) [![contributions welcome](https://img.shields.io/badge/contributions-welcome-brightgreen.svg?style=flat)](https://github.com/Riddhi9570/HackerrankPracticeProblems/issues) <img src="https://img.shields.io/badge/hacktoberfest-2021-blueviolet.svg"> <img src="https://img.shields.io/badge/hacktoberfest-2022-blueviolet.svg"> ![Profile views](https://gpvc.arturio.dev/Riddhi9570)

### Topics

<summary> SQL </summary>	
	
* [Basic Select](#basic-select)
* [Advanced Select](#advanced-select)
* [Aggregation](#aggregation)
* [Basic Join](#basic-join)
* [Advanced Join](#advanced-join)
* [Alternative Queries](#alternative-queries)
	
</details>

* [Introduction](#introduction)
* [Strings](#strings)
* [Classes](#classes)
* [STL](#stl)
* [Inheritance](#inheritance)
* [Debugging](#debugging)
* [Other Concepts](#other-concepts)

</details>

<summary> Algorithims </summary>
* [Dynamic Programming](#dynamic-programming)

</details>

* [Introduction](#introduction-1)
* [Strings](#strings-1)
* [BigNumber](#bignumber)
* [Data Structures](#data-structures)
* [Object Oriented Programming](#object-oriented-programming)
* [Exception Handling](#exception-handling)
* [Advanced](#advanced)

</details>

<summary> Python </summary>

* [Introduction](#introduction-2)
* [Basic Data Types](#basic-data-types)
* [Strings](#strings-2)
* [Sets](#sets)
* [Math](#math)
* [Itertools](#itertools)
* [Collections](#collections)
* [Date and Time](#date-and-time)
* [Errors and Exceptions](#errors-and-exceptions)
* [Classes](#classes)
* [Built-Ins](#built-ins)
* [Python Functionals](#python-functionals)
* [Regex and Parsing](#regex-and-parsing)
* [XML](#xml)
* [Closures and Decorators](#closures-and-decorators)
* [Numpy](#numpy)
* [Debugging](#debugging)

</details>

## SQL (All the solutions are given in MySQL)

### Basic Select
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Revising the Select Query I](https://www.hackerrank.com/challenges/revising-the-select-query/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/01.%20Revising%20the%20Select%20Query%20I.sql) | 10 | Easy |
| 02. | [Revising the Select Query II](https://www.hackerrank.com/challenges/revising-the-select-query-2/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/02.%20Revising%20the%20Select%20Query%20II.sql) | 10 | Easy |
| 03. | [Select All](https://www.hackerrank.com/challenges/select-all-sql/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/03.%20Select%20All.sql) | 10 | Easy |
| 04. | [Select By ID](https://www.hackerrank.com/challenges/select-by-id/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/04.%20Select%20By%20ID.sql) | 10 | Easy |
| 05. | [Japanese Cities' Attributes](https://www.hackerrank.com/challenges/japanese-cities-attributes/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/05.%20Japanese%20Cities'%20Attributes.sql) | 10 | Easy |
| 06. | [Japanese Cities' Names](https://www.hackerrank.com/challenges/japanese-cities-name/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/06.%20Japanese%20Cities'%20Names.sql) | 10 | Easy |
| 07. | [Weather Observation Station 1](https://www.hackerrank.com/challenges/weather-observation-station-1/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/07.%20Weather%20Observation%20Station%201.sql) | 15 | Easy |
| 08. | [Weather Observation Station 3](https://www.hackerrank.com/challenges/weather-observation-station-3/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/08.%20Weather%20Observation%20Station%203.sql) | 10 | Easy |
| 09. | [Weather Observation Station 4](https://www.hackerrank.com/challenges/weather-observation-station-4/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/09.%20Weather%20Observation%20Station%204.sql) | 10 | Easy |
| 10. | [Weather Observation Station 5](https://www.hackerrank.com/challenges/weather-observation-station-5/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/10.%20Weather%20Observation%20Station%205.sql) | 30 | Easy |
| 11. | [Weather Observation Station 6](https://www.hackerrank.com/challenges/weather-observation-station-6/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/11.%20Weather%20Observation%20Station%206.sql) | 10 | Easy |
| 12. | [Weather Observation Station 7](https://www.hackerrank.com/challenges/weather-observation-station-7/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/12.%20Weather%20Observation%20Station%207.sql) | 10 | Easy |
| 13. | [Weather Observation Station 8](https://www.hackerrank.com/challenges/weather-observation-station-8/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/13.%20Weather%20Observation%20Station%208.sql) | 15 | Easy |
| 14. | [Weather Observation Station 9](https://www.hackerrank.com/challenges/weather-observation-station-9/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/14.%20Weather%20Observation%20Station%209.sql) | 10 | Easy |
| 15. | [Weather Observation Station 10](https://www.hackerrank.com/challenges/weather-observation-station-10/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/15.%20Weather%20Observation%20Station%2010.sql) | 10 | Easy
| 16. | [Weather Observation Station 11](https://www.hackerrank.com/challenges/weather-observation-station-11/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/16.%20Weather%20Observation%20Station%2011.sql) | 15 | Easy |
| 17. | [Weather Observation Station 12](https://www.hackerrank.com/challenges/weather-observation-station-11/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/17.%20Weather%20Observation%20Station%2012.sql) | 15 | Easy |
| 18. | [Higher Than 75 Marks](https://www.hackerrank.com/challenges/more-than-75-marks/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/18.%20Higher%20Than%2075%20Marks.sql) | 15 | Easy |
| 19. | [Employee Names](https://www.hackerrank.com/challenges/name-of-employees/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/19.%20Employee%20Names.sql) | 10 | Easy |
| 20. | [Employee Salaries](https://www.hackerrank.com/challenges/salary-of-employees/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/1.%20BASIC%20SELECT/20.%20Employee%20Salaries.sql) | 10 | Easy |

### Advanced Select
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Type of Triangle](https://www.hackerrank.com/challenges/what-type-of-triangle/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/2.%20ADVANCED%20SELECT/01.Type%20of%20Triangle.sql) | 20 | Easy |
| 02. | [The PADS](https://www.hackerrank.com/challenges/the-pads/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/2.%20ADVANCED%20SELECT/02.%20The%20PADS.sql) | 30 | Medium |
| 03. | [Occupations ](https://www.hackerrank.com/challenges/occupations/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/2.%20ADVANCED%20SELECT/03.%20Occupations.sql) | 30 | Medium |
| 04. | [Binary Tree Nodes](https://www.hackerrank.com/challenges/binary-search-tree-1/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/2.%20ADVANCED%20SELECT/04.%20Binary%20Tree%20Nodes.sql) | 30 | Medium |
| 05. | [New Companies]( https://www.hackerrank.com/challenges/binary-search-tree-1/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/2.%20ADVANCED%20SELECT/05.%20New%20Companies.sql) | 30 | Medium |

### Aggregation
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Revising Aggregations - The Count Function](https://www.hackerrank.com/challenges/revising-aggregations-the-count-function/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/01.Revising%20Aggregations%20-%20The%20Count%20Function.sql) | 10 | Easy |
| 02. | [Revising Aggregations - The Sum Function](https://www.hackerrank.com/challenges/revising-aggregations-sum/problem) |[Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/02.%20Revising%20Aggregations%20-%20The%20Sum%20Function.sql) | 10 | Easy |
| 03. | [Revising Aggregations - Averages](https://www.hackerrank.com/challenges/revising-aggregations-the-average-function/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/03.%20Revising%20Aggregations%20-%20Averages.sql) | 10 | Easy |
| 04. | [Average Population](https://www.hackerrank.com/challenges/average-population/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/04.%20Average%20Population.sql) | 10 | Easy |
| 05. | [Japan Population](https://www.hackerrank.com/challenges/japan-population/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/05.%20Japan%20Population.sql) | 10 | Easy |
| 06. | [Population Density Difference](https://www.hackerrank.com/challenges/population-density-difference/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/06.%20Population%20Density%20Difference.sql) | 10 | Easy |
| 07. | [The Blunder](https://www.hackerrank.com/challenges/the-blunder/problem) | [solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/07.%20The%20Blunder.sql) | 15 | Easy |
| 08. | [Top Earners](https://www.hackerrank.com/challenges/earnings-of-employees/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/08.%20Top%20Earners.sql) | 20 | Easy |
| 09. | [Weather Observation Station 2](https://www.hackerrank.com/challenges/weather-observation-station-2/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/09.%20Weather%20Observation%20Station%202.sql) | 15 | Easy |
| 10. | [Weather Observation Station 13](https://www.hackerrank.com/challenges/weather-observation-station-13/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/10.%20Weather%20Observation%20Station%2013.sql) | 10 | Easy |
| 11. | [Weather Observation Station 14](https://www.hackerrank.com/challenges/weather-observation-station-14/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/11.%20Weather%20Observation%20Station%2014.sql) | 10 | Easy |
| 12. | [Weather Observation Station 15](https://www.hackerrank.com/challenges/weather-observation-station-15/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/12.%20Weather%20Observation%20Station%2015.sql) | 15 | Easy |
| 13. | [Weather Observation Station 16](https://www.hackerrank.com/challenges/weather-observation-station-16/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/13.%20Weather%20Observation%20Station%2016.sql) | 10 | Easy |
| 14. | [Weather Observation Station 17](https://www.hackerrank.com/challenges/weather-observation-station-17/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/14.%20Weather%20Observation%20Station%2017.sql) | 15 | Easy |
| 15. | [Weather Observation Station 18](https://www.hackerrank.com/challenges/weather-observation-station-18/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/15.%20Weather%20Observation%20Station%2018.sql) | 25 | Medium |
| 16. | [Weather Observation Station 19](https://www.hackerrank.com/challenges/weather-observation-station-19/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/16.%20Weather%20Observation%20Station%2019.sql) | 30 | Medium |
| 17. | [Weather Observation Station 20](https://www.hackerrank.com/challenges/weather-observation-station-20/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/3.%20AGGREGATION/17.%20Weather%20Observation%20Station%2020.sql) | 40 | Medium |

### Basic Join
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Population Census](https://www.hackerrank.com/challenges/asian-population/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/01.%20Population%20Census.sql) | 10 | Easy |
| 02. | [African Cities](https://www.hackerrank.com/challenges/african-cities/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/02.%20African%20Cities.sql) | 10 | Easy |
| 03. | [Average Population of Each Continent](https://www.hackerrank.com/challenges/average-population-of-each-continent/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/03.%20Average%20Population%20of%20Each%20Continent.sql) | 10 | Easy |
| 04. | [The Report](https://www.hackerrank.com/challenges/the-report/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/04.%20The%20Report.sql) | 20 | Medium |
| 05. | [Top Competitors](https://www.hackerrank.com/challenges/full-score/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/05.%20Top%20Competitors.sql) | 30 | Medium |
| 06. | [Ollivander's Inventory](https://www.hackerrank.com/challenges/harry-potter-and-wands/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/06.%20Ollivander's%20Inventory.sql) | 30 | Medium |
| 07. | [Challenges](https://www.hackerrank.com/challenges/challenges/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/07.%20Challenges.sql) | 30 | Medium |
| 08. | [Contest Leaderboard](https://www.hackerrank.com/challenges/contest-leaderboard/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/4.%20BASIC%20JOIN/08.%20Contest%20Leaderboard.sql) | 30 | Medium |

### Advanced Join
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [SQL Project Planning](https://www.hackerrank.com/challenges/sql-projects/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/5.%20ADVANCED%20JOIN/01.%20SQL%20Project%20Planning.sql) | 40 | Medium |
| 02. | [SQL Symmetric Pairs](https://www.hackerrank.com/challenges/symmetric-pairs/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/5.%20ADVANCED%20JOIN/02.%20SQL%20Symmetric%20Pairs.sql) | 40 | Medium |
| 03. | [15 Days of Learning SQL](https://www.hackerrank.com/challenges/sql-projects/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/5.%20ADVANCED%20JOIN/03.%2015%20Days%20of%20Learning%20SQL.sql) | 40 | Medium |

### Alternative Queries
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Draw The Triangle 1](https://www.hackerrank.com/challenges/draw-the-triangle-1/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/6.%20ALTERNATIVE%20QUERIES/01.%20Draw%20The%20Triangle%201.sql) | 25 | Easy |
| 02. | [Draw The Triangle 2](https://www.hackerrank.com/challenges/draw-the-triangle-2/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/SQL/6.%20ALTERNATIVE%20QUERIES/02.%20Draw%20The%20Triangle%202.sql) | 25 | Easy |

## C++

### Introduction
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Arrays Introduction](https://www.hackerrank.com/challenges/arrays-introduction/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Arrays%20Introduction.cpp) | 10 | Easy |
| 02. | [Basic Data Types](https://www.hackerrank.com/challenges/c-tutorial-basic-data-types/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Basic%20Data%20Types.cpp) | 10 | Easy |
| 03. | [Conditional Statements](https://www.hackerrank.com/challenges/c-tutorial-conditional-if-else/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Conditional%20Statements.cpp) | 10 | Easy |
| 04. | [For Loop](https://www.hackerrank.com/challenges/c-tutorial-for-loop/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/For%20Loop.cpp) | 10 | Easy |
| 05. | [Pointer](https://www.hackerrank.com/challenges/c-tutorial-pointer/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Pointer.cpp) | 10 | Easy |
| 06. | [Say "Hello, World!" With C++](https://www.hackerrank.com/challenges/cpp-hello-world/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Say_Hello_World_With_C%2B%2B.cpp) | 05 | Easy |
| 07. | [Variable Sized Arrays](https://www.hackerrank.com/challenges/variable-sized-arrays/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Variable%20Sized%20Arrays.cpp) | 30 | Easy |
| 08. | [Input and Output](https://www.hackerrank.com/challenges/cpp-input-and-output/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/01.%20Introduction/Input%20and%20Output.cpp) | 05 | Easy |

### Strings
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Attribute Parser](https://www.hackerrank.com/challenges/attribute-parser/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/02.%20Strings/Attribute%20Parser.cpp) | 35 | Medium |
| 02. | [StringStream](https://www.hackerrank.com/challenges/c-tutorial-stringstream/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/02.%20Strings/StringStream.cpp) | 10 | Easy |
| 03. | [Strings](https://www.hackerrank.com/challenges/c-tutorial-strings/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/02.%20Strings/Strings.cpp) | 10 | Easy |

### Classes
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Class](https://www.hackerrank.com/challenges/c-tutorial-class/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/03.%20Classes/Class.cpp) | 10 | Easy |
| 02. | [Structs](https://www.hackerrank.com/challenges/c-tutorial-struct/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/03.%20Classes/Structs.cpp) | 10 | Easy |

### STL
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Deque-STL](https://www.hackerrank.com/challenges/deque-stl/problem?isFullScreen=false) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/04.%20STL/Deque-STL.cpp) | 50 | Medium |
| 02. | [Lower Bound-STL](https://www.hackerrank.com/challenges/cpp-lower-bound/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/04.%20STL/Lower%20Bound-STL.cpp) | 15 | Easy |
| 03. | [Sets-STL](https://www.hackerrank.com/challenges/cpp-sets/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/04.%20STL/Sets-STL.cpp) | 15 | Easy |
| 04. | [Vector-Sort](https://www.hackerrank.com/challenges/vector-sort/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/04.%20STL/Vector-Sort.cpp) | 10 | Easy |

### Inheritance
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Multi Level Inheritance](https://www.hackerrank.com/challenges/multi-level-inheritance-cpp/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/05.%20Inheritance/Multi_Level_Inheritance.cpp) | 50 | Medium |
| 02. | [Rectangle Area](https://www.hackerrank.com/challenges/rectangle-area/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/05.%20Inheritance/Rectangle%20Area.cpp) | 25 | Easy |

### Debugging
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [CPP Exception Handling](https://www.hackerrank.com/challenges/cpp-exception-handling/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/06.%20Debugging/CPP%20Exception%20Handling.cpp) | 20 | Medium |
| 02. | [Overloading Ostream Operator](https://www.hackerrank.com/challenges/overloading-ostream-operator/problem?isFullScreen=true) | [Solution](https://www.hackerrank.com/challenges/overloading-ostream-operator/submissions/code/293723048) | 20 | Medium |

### Other Concepts
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Operator Overloading](https://www.hackerrank.com/challenges/operator-overloading/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/C%2B%2B/07.%20Other%20Concepts/Operator%20Overloading.cpp) | 25 | Medium |

## Algorithims

### Dynamic programming
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [The Coin Change Problem](https://www.hackerrank.com/challenges/coin-change/problem?isFullScreen=true) | [Solution]() | 60 | Medium |
| 02. | [Equal](https://www.hackerrank.com/challenges/equal/problem?isFullScreen=true) | [Solution]() | 30 | Medium |
| 03. | [Stock Maximize](https://www.hackerrank.com/challenges/stockmax/problem?isFullScreen=true) | [Solution]() | 50 | Medium |

## Java

### Introduction
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Java Date and Time](https://www.hackerrank.com/challenges/java-date-and-time/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/01.%20Introduction/Java%20Date%20and%20Time.java) | 15 | Easy |
| 02. | [Java If-Else](https://www.hackerrank.com/challenges/java-if-else/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/01.%20Introduction/Java%20If-Else.java) | 10 | Easy |
| 03. | [Java Int to String](https://www.hackerrank.com/challenges/java-int-to-string/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/01.%20Introduction/Java%20Int%20to%20String.java) | 10 | Easy |
| 04. | [Java Loops II](https://www.hackerrank.com/challenges/java-loops/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/01.%20Introduction/Java%20Loops%20II.java) | 10 | Easy |
| 05. | [Java Stdin and Stdout I](https://www.hackerrank.com/challenges/java-stdin-and-stdout-1/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/01.%20Introduction/Java%20Stdin%20and%20Stdout%20I.java) | 05 | Easy |
| 06. | [Java Stdin and Stdout II](https://www.hackerrank.com/challenges/java-stdin-stdout/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/Introduction/DateTime.java) | 10 | Easy |
| 07. | [Welcome To Java](https://www.hackerrank.com/challenges/welcome-to-java/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/01.%20Introduction/Welcome%20To%20Java.java) | 03 | Easy |

### Strings
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Java Substring](https://www.hackerrank.com/challenges/java-substring/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/02.%20Strings/Java%20Substring.java) | 05 | Easy |

### BigNumber
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|

### Data Structures
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Java 1D Array](https://www.hackerrank.com/challenges/java-1d-array-introduction/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/04.%20Data%20Structures/Java%201D%20Array.java) | 05 | Easy |
| 02. | [Java Stack](https://www.hackerrank.com/challenges/java-stack/problem) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Java/04.%20Data%20Structures/Java%20Stack.java) | 20 | Medium |

### Object Oriented Programming
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Java Abstract Class](https://www.hackerrank.com/challenges/java-abstract-class/problem) | [Solution]() | 10 | Easy |
| 02. | [Java Inheritance I](https://www.hackerrank.com/challenges/java-inheritance-1/problem) | [Solution]() | 05 | Easy |
| 03. | [Java Inheritance II](https://www.hackerrank.com/challenges/java-inheritance-2/problem) | [Solution]() | 10 | Easy |

## Python

### Introduction
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Loops](https://www.hackerrank.com/challenges/python-loops/problem?isFullScreen=true) | [Solution]()| 10 | Easy |
| 02. | [Python Division](https://www.hackerrank.com/challenges/python-division/problem?isFullScreen=true) | [Solution]() | 10 | Easy |
| 03. | [Python If-Else](https://www.hackerrank.com/challenges/py-if-else/problem) | [Solution]() | 10 | Easy |
| 04. | [Write a Function](https://www.hackerrank.com/challenges/write-a-function/problem?isFullScreen=true) | [Solution]() | 10 | Medium |

### Basic Data Types
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [Finding the Runner-Up Score](https://www.hackerrank.com/challenges/find-second-maximum-number-in-a-list/problem) | [Solution]()| 10 | Easy |
| 02. | [Finding the percentage](https://www.hackerrank.com/challenges/finding-the-percentage/problem) | [Solution]()| 10 | Easy |
| 03. | [List Comprehensions](https://www.hackerrank.com/challenges/list-comprehensions/problem?isFullScreen=true) | [Solution](https://github.com/Riddhi9570/HackerrankPracticeProblems/blob/main/Python/Basic%20Data%20Types/ListComprehensions.py) | 10 | Easy |

### Strings
| S.No. | Problem | Solution | Score | Difficulty |
|--|--|--|--|--|
| 01. | [sWAP CASE](https://www.hackerrank.com/challenges/swap-case/problem?isFullScreen=true) | [Solution](https://www.hackerrank.com/challenges/swap-case/submissions/code/293772315) | 10 | Easy |

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