Hackerrank - Algorithms

This repository contains the challenges of algorithms and data structure of the site Hackerrank.

Algorithms domain

Subdomain	Challenge	Level	Max Score	Score Obtained
Warmup	Solve Me First	Easy	1	1
Warmup	Simple Array Sum	Easy	10	10
Warmup	Compare the Triplets	Easy	10	10
Warmup	A Very Big Sum	Easy	10	10
Warmup	Diagonal Difference	Easy	10	10
Warmup	Plus Minus	Easy	10	10
Warmup	Staircase	Easy	10	10
Warmup	Mini-Max Sum	Easy	10	10
Warmup	Birthday Cake Candles	Easy	10	10
Warmup	Time Conversion	Easy	15	15
Implementation	Grading Students	Easy	10	10
Implementation	Apple and Orange	Easy	10	10
Implementation	Kangaroo	Easy	10	10
Implementation	Between Two Sets	Easy	10	10
Implementation	Breaking the Records	Easy	10	10
Implementation	Birthday Chocolate	Easy	10	10
Implementation	Divisible Sum Pairs	Easy	10	10
Implementation	Migratory Birds	Easy	10	10
Implementation	Bon Appétit	Easy	10	10
Implementation	Sock Merchant	Easy	10	10
Implementation	Drawing Book	Easy	10	10
Implementation	Counting Valleys	Easy	15	15
Implementation	Cats and a Mouse	Easy	15	15
Implementation	Beautiful Days at the Movies	Easy	15	15
Implementation	Electronics Shop	Easy	15	15
Implementation	The Hurdle Race	Easy	15	15
Implementation	Day of the Programmer	Easy	15	15
Implementation	Jumping on the Clouds: Revisited	Easy	15	15
Implementation	Library Fine	Easy	15	15
Implementation	Viral Advertising	Easy	15	15
Implementation	Designer PDF Viewer	Easy	20	20
Implementation	Picking Numbers	Easy	20	20
Implementation	Sequence Equation	Easy	20	20
Implementation	Beautiful Triplets	Easy	20	20
Implementation	Angry Professor	Easy	20	20
Implementation	Service Lane	Easy	20	20
Implementation	Minimum Distances	Easy	20	20
Implementation	Repeated String	Easy	20	20
Implementation	Sherlock and Squares	Easy	20	20
Implementation	Utopian Tree	Easy	20	20
Implementation	Equalize the Array	Easy	20	20
Implementation	Jumping on the Clouds	Easy	20	20
Implementation	Halloween Sale	Easy	20	20
Implementation	Extra Long Factorials	Medium	20	20
Implementation	Find Digits	Easy	25	25
Implementation	Cut the sticks	Easy	25	25
Implementation	Taum and B'day	Easy	25	25
Implementation	Lisa's Workbook	Easy	25	25
Implementation	Chocolate Feast	Easy	25	25
Implementation	ACM ICPC Team	Easy	25	25
Implementation	Fair Rations	Easy	25	25
Implementation	The Time in Words	Medium	25	25
Implementation	Modified Kaprekar Numbers	Easy	30	30
Implementation	Cavity Map	Easy	30	30
Implementation	Encryption	Medium	30	30
Implementation	Organizing Containers of Balls	Medium	30	30
Strings	Super Reduced String	Easy	10	10
Strings	CamelCase	Easy	15	15
Strings	Mars Exploration	Easy	15	15
Strings	Strong Password	Easy	15	15
Strings	Two Characters	Easy	20	20
Strings	Alternating Characters	Easy	20	20
Strings	HackerRank in a String!	Easy	20	20
Strings	Pangrams	Easy	20	20
Strings	Gemstones	Easy	20	20
Strings	Funny String	Easy	25	25
Strings	Making Anagrams	Easy	30	30
Strings	Game of Thrones - I	Easy	30	30
Sorting	Intro to Tutorial Challenges	Easy	30	30
Sorting	Insertion Sort - Part 1	Easy	30	30
Sorting	Insertion Sort - Part 2	Easy	30	30
Sorting	Correctness and the Loop Invariant	Easy	30	30
Sorting	Quicksort 1 - Partition	Easy	10	10
Sorting	Counting Sort 1	Easy	30	30
Sorting	Counting Sort 2	Easy	30	30
Sorting	Running Time of Algorithms	Easy	30	30
Sorting	Find the Median	Easy	35	35
Sorting	Closest Numbers	Easy	35	35
Graph Theory	Even Tree	Medium	50	50
Dynamic Programming	Fibonacci Modified	Medium	45	45
Dynamic Programming	The Coin Change Problem	Medium	60	60
Search	Hackerland Radio Transmitters	Medium	25	25
Search	Ice Cream Parlor	Easy	30	30
Search	Missing Numbers	Easy	45	45
Greedy	Marc's Cakewalk	Easy	15	15
Greedy	Luck Balance	Easy	20	20
Greedy	Priyanka and Toys	Easy	30	30
Greedy	Mark and Toys	Easy	35	35
Greedy	Permuting Two Arrays	Easy	40	40
Greedy	Jim and the Orders	Easy	40	40
Greedy	Greedy Florist	Medium	35	35
Recursion	The Power Sum	Medium	20	20
Recursion	Recursive Digit Sum	Medium	30	30
Bit Manipulation	Lonely Integer	Easy	20	20
Bit Manipulation	Sum vs XOR	Easy	25	25
Bit Manipulation	Maximizing XOR	Easy	30	30
Bit Manipulation	Flipping bits	Easy	40	40

Data Structures domain

Subdomain	Challenge	Level	Max Score	Score Obtained
Linked Lists	Insert a Node at the Tail of a Linked List	Easy	5	5
Linked Lists	Insert a node at the head of a linked list	Easy	5	5
Linked Lists	Insert a node at a specific position in a linked list	Easy	5	5
Linked Lists	Delete a Node	Easy	5	5
Linked Lists	Reverse a linked list	Easy	5	5
Linked Lists	Compare two linked lists	Easy	5	5
Linked Lists	Print in Reverse	Easy	5	5
Linked Lists	Reverse a doubly linked list	Easy	5	5
Linked Lists	Inserting a Node Into a Sorted Doubly Linked List	Easy	5	5
Linked Lists	Merge two sorted linked lists	Easy	5	5
Linked Lists	Delete duplicate-value nodes from a sorted linked list	Easy	5	5
Linked Lists	Cycle Detection	Medium	5	5
Trees	Tree: Preorder Traversal	Easy	10	10
Trees	Tree: Inorder Traversal	Easy	10	10
Trees	Tree: Postorder Traversal	Easy	10	10
Trees	Tree: Height of a Binary Tree	Easy	10	10
Trees	Tree: Level Order Traversal	Easy	20	20
Trees	Binary Search Tree : Insertion	Easy	20	20
Trees	Tree : Top View	Easy	20	20
Trees	Binary Search Tree : Lowest Common Ancestor	Easy	30	30
Trees	Is This a Binary Search Tree?	Medium	30	30
Stack	Equal Stacks	Easy	25	25
Stack	Balanced Brackets	Medium	25	25
Array	Left Rotation	Easy	20	20
Array	Sparse Arrays	Medium	25	25
Array	Array Manipulation	Hard	60	60
Queue	Truck Tour	Hard	50	50