Hackerrank

Repository for the Hackerrank Challenges practice.

Acquired Badges

10 Days of JavaScript Solved 15/02/2023	Problem Solving - Silver II Solved ??/??/????	Java - Silver III Solved ??/??/????	SQL - Silver IV Acquired 14/03/2023

Solved Challenges in Python

No.	Problem	Solution	Difficulty	Points	Category
001	Solve Me First	Python	Easy	1.00	Alghoritms - Warmup
002	Simple Array Sum	Python	Easy	10.00	Alghoritms - Warmup
003	Compare the Triplets	Python	Easy	10.00	Alghoritms - Warmup
004	A Very Big Sum	Python	Easy	10.00	Alghoritms - Warmup
005	Diagonal Difference	Python	Easy	10.00	Alghoritms - Warmup
006	Plus Minus	Python	Easy	10.00	Alghoritms - Warmup
007	Staircase	Python	Easy	10.00	Alghoritms - Warmup
008	Mini-Max Sum	Python	Easy	10.00	Alghoritms - Warmup
009	Birthday Cake Candles	Python	Easy	10.00	Alghoritms - Warmup
010	Time Conversion	Python	Easy	15.00	Alghoritms - Warmup
011	Grading Students	Python	Easy	10.00	Alghoritms - Implementation
012	Apple and Orange	Python	Easy	10.00	Alghoritms - Implementation
013	Number Line Jumps (Kangaroo)	Python	Easy	10.00	Alghoritms - Implementation
014	Between Two Sets	Python	Easy	10.00	Alghoritms - Implementation
015	Breaking the Records	Python	Easy	10.00	Alghoritms - Implementation
016	Subarray Division (The Birthday Bar)	Python	Easy	10.00	Alghoritms - Implementation
017	Divisible Sum Pairs	Python	Easy	10.00	Alghoritms - Implementation

Java

No.	Problem	Difficulty	Solved	Points
001	Welcome to Java!	Easy	✔️	3.00
002	Java Stdin and Stdout I	Easy	✔️	5.00
003	Java If-Else	Easy	✔️	10.00
004	Java Stdin and Stdout II	Easy	✔️	10.00
005	Java Loops I	Easy	✔️	10.00
006	Java Loops II	Easy	✔️	10.00
007	Java Datatypes	Easy	✔️	10.00
008	Java End-of-file	Easy	✔️	10.00
009	Java Static Initializer Block	Easy	✔️	10.00
010	Java Int to String	Easy	✔️	10.00
011	Java Date and Time	Easy	✔️	15.00
012	Java Currency Formatter	Easy	✔️	15.00

10 Days of Javascript

No.	Problem	Difficulty	Solved	Points
001	Day 0: Hello, World!	Easy	✔️	10.00
002	Day 0: Data Types	Easy	✔️	10.00
003	Day 1: Arithmetic Operators	Easy	✔️	10.00
004	Day 1: Functions	Easy	✔️	10.00
005	Day 1: Let and Const	Easy	✔️	10.00
006	Day 2: Conditional Statemets: If-Else	Easy	✔️	10.00
007	Day 2: Conditional Statements: Switch	Easy	✔️	10.00
008	Day 2: Loops	Easy	✔️	10.00
009	Day 3: Arrays	Easy	✔️	15.00
010	Day 3: Try, Catch, and Finally	Easy	✔️	15.00
011	Day 3: Throw	Easy	✔️	15.00
012	Day 4: Create a Rectangle Object	Easy	✔️	15.00
013	Day 4: Count Objects	Easy	✔️	15.00
014	Day 4: Classes	Easy	✔️	15.00
015	Day 5: Inheritance	Easy	✔️	15.00
016	Day 5: Template Literals	Easy	✔️	15.00
017	Day 5: Arrow Functions	Easy	✔️	15.00
018	Day 6: Bitwise Operators	Easy	✔️	15.00
019	Day 6: JavaScript Dates	Easy	✔️	15.00
020	Day 7: Regular Expressions I	Easy	✔️	15.00
021	Day 7: Regular Expressions II	Easy	✔️	15.00
022	Day 7: Regular Expressions III	Easy	✔️	15.00
023	Day 8: Create a Button	Easy	✔️ HTML CSS JS	20.00
024	Day 8: Buttons Container	Easy	✔️ HTML CSS JS	25.00
025	Day 9: Binary Calculator	Medium	✔️ HTML CSS JS	12.00

SQL

Solved mostly in DB2.

No.	Problem	Difficulty	Skills	Solved	Points	Category
001	Revising the Select Query I	Easy	SQL (Basic)	✔️	10.00	Basic Select
002	Revising the Select Query II	Easy	SQL (Basic)	✔️	10.00	Basic Select
003	Select All	Easy	SQL (Basic)	✔️	10.00	Basic Select
004	Select By ID	Easy	SQL (Basic)	✔️	10.00	Basic Select
005	Japanese Cities' Attributes	Easy	SQL (Basic)	✔️	10.00	Basic Select
006	Japanese Cities' Names	Easy	SQL (Basic)	✔️	10.00	Basic Select
007	Weather Observation Station 1	Easy	SQL (Basic)	✔️	15.00	Basic Select
008	Weather Observation Station 3	Easy	SQL (Basic)	✔️	15.00	Basic Select
009	Weather Observation Station 4	Easy	SQL (Basic)	✔️	10.00	Basic Select
010	Weather Observation Station 5	Easy	SQL (Intermediate)	✔️	30.00	Basic Select
011	Weather Observation Station 6	Easy	SQL (Basic)	✔️	10.00	Basic Select
012	Weather Observation Station 7	Easy	SQL (Basic)	✔️	10.00	Basic Select
013	Weather Observation Station 8	Easy	SQL (Basic)	✔️	15.00	Basic Select
014	Weather Observation Station 9	Easy	SQL (Basic)	✔️	10.00	Basic Select
015	Weather Observation Station 10	Easy	SQL (Basic)	✔️	10.00	Basic Select
016	Weather Observation Station 11	Easy	SQL (Basic)	✔️	15.00	Basic Select
017	Weather Observation Station 12	Easy	SQL (Basic)	✔️	15.00	Basic Select
018	Higher Than 75 Marks	Easy	SQL (Basic)	✔️	15.00	Basic Select
019	Employee Names	Easy	SQL (Basic)	✔️	10.00	Basic Select
020	Employee Salaries	Easy	SQL (Basic)	✔️	10.00	Basic Select
021	Type of Triangle	Easy	SQL (Basic)	✔️	20.00	Advanced Select
022	The PADS	Medium	SQL (Basic)	❌	30.00	Advanced Select
023	Occupations	Medium	SQL (Basic)	❌	30.00	Advanced Select
024	Binary Tree Nodes	Medium	SQL (Intermediate)	❌	30.00	Advanced Select
025	New Companies	Medium	SQL (Intermediate)	❌	30.00	Advanced Select
026	Revising Aggregations - The Count Function	Easy	SQL (Basic)	✔️	10.00	Aggregation
027	Revising Aggregations - The Sum Function	Easy	SQL (Basic)	✔️	10.00	Aggregation
028	Revising Aggregations - Averages	Easy	SQL (Basic)	✔️	10.00	Aggregation
029	Average Population	Easy	SQL (Basic)	✔️	10.00	Aggregation
030	Japan Population	Easy	SQL (Basic)	✔️	10.00	Aggregation
031	Population Density Difference	Easy	SQL (Basic)	✔️	10.00	Aggregation
032	The Blunder	Easy	SQL (Basic)	❌	15.00	Aggregation
033	Top Earners	Easy	SQL (Basic)	❌	20.00	Aggregation
034	Weather Observation Station 2	Easy	SQL (Basic)	✔️	15.00	Aggregation
035	Weather Observation Station 13	Easy	SQL (Basic)	✔️	10.00	Aggregation
036	Weather Observation Station 14	Easy	SQL (Basic)	✔️	10.00	Aggregation
037	Weather Observation Station 15	Easy	SQL (Basic)	✔️	15.00	Aggregation
038	Weather Observation Station 16	Easy	SQL (Basic)	✔️	10.00	Aggregation
039	Weather Observation Station 17	Easy	SQL (Basic)	✔️	15.00	Aggregation
040	Weather Observation Station 18	Medium	SQL (Basic)	✔️	25.00	Aggregation
041	Weather Observation Station 19	Medium	SQL (Basic)	✔️	30.00	Aggregation
042	Weather Observation Station 20	Medium	SQL (Intermediate)	❌	40.00	Aggregation
043	Population Census	Easy	SQL (Basic)	✔️	10.00	Basic Join
044	African Cities	Easy	SQL (Basic)	✔️	10.00	Basic Join
045	Average Population of Each Continent	Easy	SQL (Basic)	✔️	10.00	Basic Join
046	The Report	Medium	SQL (Intermediate)	❌	20.00	Basic Join
047	The Competitors	Medium	SQL (Intermediate)	❌	30.00	Basic Join
048	Olivander's Inventory	Medium	SQL (Intermediate)	❌	30.00	Basic Join
049	Challenges	Medium	SQL (Intermediate)	❌	30.00	Basic Join
050	Contest Leaderboard	Medium	SQL (Intermediate)	❌	30.00	Basic Join
051	Placements	Medium	SQL (Intermediate)	❌	40.00	Advanced Join
052	Symmetric Pairs	Medium	SQL (Intermediate)	❌	40.00	Advanced Join
053	Interviews	Hard	SQL (Intermediate)	❌	50.00	Advanced Join
054	15 Days of Learning SQL	Hard	SQL (Advanced)	❌	50.00	Advanced Join
055	Draw The Triangle 1	Easy	SQL (Advanced)	❌	25.00	Alternative Queries
056	Draw The Triangle 2	Easy	SQL (Advanced)	❌	25.00	Alternative Queries
057	Print Prime Numbers	Medium	SQL (Advanced)	❌	40.00	Alternative Queries

Comments

CSS code for IDE I use

<style> * { color: #fff !important; } a { color: #ad0 !important; } body { background: #000 !important; } /* table:nth-of-type(1) * { border: none !important; text-align: left; min-height: 25px !important; } */ table td:not(:nth-of-type(2)) { text-align: center !important; } table td:nth-of-type(4) table:not(:first-of-type) { color: #ad0 !important; font-weight: bold; } table:first-of-type a * { color: #ad0 !important; } table:first-of-type td { min-width: 200px !important; } table:first-of-type th { display: none !important; } table:first-of-type tr:first-of-type td { border: none; } table:first-of-type tr { margin: 0 10px !important; text-align: center; } table td:empty { background: #440 !important; } </style>