willndira / HackerRank-solutions

228 efficient solutions to HackerRank problems

HackerRank-solutions

228 efficient solutions to HackerRank problems

• 10 Days of Statistics (Complete)
• 30 Days of Code (28/30 solutions)
• Algorithms (47/365 solutions)
• Cracking the Coding Interview (Complete)
• Data Structures (41/107 solutions)
• Java (Complete)

Solutions are coded using Java 8

10 Days of Statistics

Domain	Subdomain	Day	Challenge	Difficulty	Solution
Tutorials	10 Days of Statistics	0	Mean, Median, and Mode	Easy	Solution.java
Tutorials	10 Days of Statistics	0	Weighted Mean	Easy	Solution.java
Tutorials	10 Days of Statistics	1	Quartiles	Easy	Solution.java
Tutorials	10 Days of Statistics	1	Interquartile Range	Easy	Solution.java
Tutorials	10 Days of Statistics	1	Standard Deviation	Easy	Solution.java
Tutorials	10 Days of Statistics	2	Basic Probability	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	2	More Dice	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	2	Compound Event Probability	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	3	Conditional Probability	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	3	Cards of the Same Suit	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	3	Drawing Marbles	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	4	Binomial Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	4	Binomial Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	4	Geometric Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	4	Geometric Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Poisson Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Poisson Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Normal Distribution I	Easy	Solution.java
Tutorials	10 Days of Statistics	5	Normal Distribution II	Easy	Solution.java
Tutorials	10 Days of Statistics	6	The Central Limit Theorem I	Easy	Solution.java
Tutorials	10 Days of Statistics	6	The Central Limit Theorem II	Easy	Solution.java
Tutorials	10 Days of Statistics	6	The Central Limit Theorem III	Easy	Solution.java
Tutorials	10 Days of Statistics	7	Pearson Correlation Coefficient I	Easy	Solution.java
Tutorials	10 Days of Statistics	7	Spearman's Rank Correlation Coefficient	Easy	Solution.java
Tutorials	10 Days of Statistics	8	Least Square Regression Line	Easy	Solution.java
Tutorials	10 Days of Statistics	8	Pearson Correlation Coefficient II	Multiple Choice	Solution.txt
Tutorials	10 Days of Statistics	9	Multiple Linear Regression	Medium	Solution.java

30 Days of Code

Domain	Subdomain	Day	Challenge	Difficulty	Solution
Tutorials	30 Days of Code	0	Hello, World	Easy	Solution.java
Tutorials	30 Days of Code	1	Data Types	Easy	Solution.java
Tutorials	30 Days of Code	2	Operators	Easy	Solution.java
Tutorials	30 Days of Code	3	Intro to Conditional Statements	Easy	Solution.java
Tutorials	30 Days of Code	4	Class vs. Instance	Easy	Solution.java
Tutorials	30 Days of Code	5	Loops	Easy	Solution.java
Tutorials	30 Days of Code	6	Let's Review	Easy	Solution.java
Tutorials	30 Days of Code	7	Arrays	Easy	Solution.java
Tutorials	30 Days of Code	8	Dictionaries and Maps	Easy	Solution.java
Tutorials	30 Days of Code	9	Recursion	Easy	Solution.java
Tutorials	30 Days of Code	10	Binary Numbers	Easy	Solution.java
Tutorials	30 Days of Code	11	2D Arrays	Easy	Solution.java
Tutorials	30 Days of Code	12	Inheritance	Easy	Solution.java
Tutorials	30 Days of Code	13	Abstract Classes	Easy	Solution.java
Tutorials	30 Days of Code	14	Scope	Easy	Solution.java
Tutorials	30 Days of Code	15	Linked List	Easy	Solution.java
Tutorials	30 Days of Code	16	Exceptions - String to Integer	Easy	Solution.java
Tutorials	30 Days of Code	17	More Exceptions	Easy	Solution.java
Tutorials	30 Days of Code	18	Queues and Stacks	Easy	Solution.java
Tutorials	30 Days of Code	19	Interfaces	Easy	Solution.java
Tutorials	30 Days of Code	20	Sorting	Easy	Solution.java
Tutorials	30 Days of Code	21	Generics	Easy	Solution.java
Tutorials	30 Days of Code	22	Binary Search Trees	Easy	Solution.java
Tutorials	30 Days of Code	23	BST Level-Order Traversal	Easy	Solution.java
Tutorials	30 Days of Code	24	More Linked Lists	Easy	Solution.java
Tutorials	30 Days of Code	25	Running Time and Complexity	Medium	Solution.java
Tutorials	30 Days of Code	26	Nested Logic	Easy	Solution.java
Tutorials	30 Days of Code	27	Testing	Easy	Solution.java
Tutorials	30 Days of Code	28	RegEx, Patterns, and Intro to Databases	Medium	Coming Soon!
Tutorials	30 Days of Code	29	Bitwise AND	Medium	Coming Soon!

Algorithms

Domain	Subdomain	Challenge	Difficulty	Solution
Algorithms	Warmup	Solve Me First	Easy	Solution.java
Algorithms	Warmup	Simple Array Sum	Easy	Solution.java
Algorithms	Warmup	Compare the Triplets	Easy	Solution.java
Algorithms	Warmup	A Very Big Sum	Easy	Solution.java
Algorithms	Warmup	Diagonal Difference	Easy	Solution.java
Algorithms	Warmup	Plus Minus	Easy	Solution.java
Algorithms	Warmup	Staircase	Easy	Solution.java
Algorithms	Warmup	Mini-max Sum	Easy	Solution.java
Algorithms	Warmup	Time Conversion	Easy	Solution.java
Algorithms	Implementation	Grading Students	Easy	Solution.java
Algorithms	Implementation	Designer PDF Viewer	Easy	Solution.java
Algorithms	Implementation	Apple and Orange	Easy	Solution.java
Algorithms	Implementation	Kangaroo	Easy	Solution.java
Algorithms	Implementation	Between Two Sets	Easy	Solution.java
Algorithms	Implementation	Divisible Sum Pairs	Easy	Solution.java
Algorithms	Implementation	Bon Appetit	Easy	Solution.java
Algorithms	Implementation	Sock Merchant	Easy	Solution.java
Algorithms	Implementation	The Hurdle Race	Easy	Solution.java
Algorithms	Implementation	Utopian Tree	Easy	Solution.java
Algorithms	Implementation	Angry Professor	Easy	Solution.java
Algorithms	Implementation	Beautiful Days at the Movies	Easy	Solution.java
Algorithms	Implementation	Viral Advertising	Easy	Solution.java
Algorithms	Implementation	Save the Prisoner!	Easy	Solution.java
Algorithms	Implementation	Sequence Equation	Easy	Solution.java
Algorithms	Implementation	Circular Array Rotation	Easy	Solution.java
Algorithms	Implementation	Jumping on the Clouds - Revisited	Easy	Solution.java
Algorithms	Implementation	Find Digits	Easy	Solution.java
Algorithms	Implementation	Extra Long Factorials	Medium	Solution.java
Algorithms	Implementation	Append and Delete	Easy	Solution.java
Algorithms	Implementation	Sherlock and Squares	Easy	Solution.java
Algorithms	Implementation	Library Fine	Easy	Solution.java
Algorithms	Implementation	Cut the sticks	Easy	Coming Soon!
Algorithms	Implementation	Non-Divisible Subset	Medium	Coming Soon!
Algorithms	Implementation	Repeated String	Easy	Solution.java
Algorithms	Implementation	Jumping on the Clouds	Easy	Solution.java
Algorithms	Implementation	Equalize the Array	Easy	Solution.java
Algorithms	Implementation	ACM ICPC Team	Easy	Coming Soon!
Algorithms	Implementation	Taum and B'day	Easy	Solution.java
Algorithms	Implementation	Organizing Containers of Balls	Medium	Coming Soon!
Algorithms	Implementation	Encryption	Medium	Coming Soon!
Algorithms	Implementation	Bigger is Greater	Medium	Coming Soon!
Algorithms	Implementation	Modified Kaprekar Numbers	Easy	Solution.java
Algorithms	Implementation	Beautiful Triplets	Easy	Solution.java
Algorithms	Implementation	Manasa and Stones	Easy	Solution.java
Algorithms	Implementation	Minimum Distances	Easy	Coming Soon!
Algorithms	Implementation	The Time in Words	Medium	Coming Soon!
Algorithms	Implementation	Cavity Map	Easy	Coming Soon!
Algorithms	Implementation	Chocolate Feast	Easy	Coming Soon!
Algorithms	Implementation	Service Lane	Easy	Coming Soon!
Algorithms	Implementation	Lisa's Workbook	Easy	Coming Soon!
Algorithms	Implementation	The Grid Search	Medium	Coming Soon!
Algorithms	Implementation	Flatland Space Stations	Easy	Coming Soon!
Algorithms	Implementation	Fair Rations	Easy	Coming Soon!
Algorithms	Implementation	Happy Ladybugs	Easy	Coming Soon!
Algorithms	Implementation	Strange Counter	Easy	Coming Soon!
Algorithms	Implementation	Almost Sorted	Medium	Coming Soon!
Algorithms	Implementation	Absolute Permutation	Medium	Coming Soon!
Algorithms	Implementation	The Bomberman Game	Medium	Coming Soon!
Algorithms	Implementation	Ema's Supercomputer	Medium	Coming Soon!
Algorithms	Implementation	Larry's Array	Medium	Coming Soon!
Algorithms	Implementation	Matrix Layer Rotation	Hard	Coming Soon!
Algorithms	Strings	Super Reduced String	Easy	Solution.java
Algorithms	Strings	CamelCase	Easy	Solution.java
Algorithms	Strings	Two Characters	Easy	Coming Soon!
Algorithms	Strings	Pangrams	Easy	Coming Soon!
Algorithms	Strings	Caesar Cipher	Easy	Coming Soon!
Algorithms	Strings	Mars Exploration	Easy	Coming Soon!
Algorithms	Strings	Funny String	Easy	Coming Soon!
Algorithms	Strings	Gemstones	Easy	Coming Soon!
Algorithms	Strings	Alternating Characters	Easy	Coming Soon!
Algorithms	Strings	Beautiful Binary String	Easy	Coming Soon!
Algorithms	Strings	The Love-Letter Mystery	Easy	Coming Soon!
Algorithms	Strings	Palindrome Index	Easy	Coming Soon!
Algorithms	Strings	Anagram	Easy	Coming Soon!
Algorithms	Strings	Making Anagrams	Easy	Solution.java
Algorithms	Strings	Game of Thrones - I	Easy	Coming Soon!
Algorithms	Strings	Two Strings	Easy	Coming Soon!
Algorithms	Strings	String Construction	Easy	Coming Soon!
Algorithms	Strings	Sherlock and Valid String	Hard	Coming Soon!
Algorithms	Strings	Richie Rich	Medium	Coming Soon!
Algorithms	Strings	Sherlock and Anagrams	Medium	Coming Soon!
Algorithms	Strings	Common Child	Hard	Coming Soon!
Algorithms	Strings	Bear and Steady Gene	Medium	Coming Soon!
Algorithms	Strings	Morgan and a String	Expert	Coming Soon!
Algorithms	Strings	Count Strings	Hard	Coming Soon!
Algorithms	Strings	String Function Calculation	Advanced	Coming Soon!
Algorithms	Strings	Build a Palindrome	Advanced	Coming Soon!
Algorithms	Strings	Build a String	Hard	Coming Soon!
Algorithms	Strings	Gridland Provinces	Hard	Coming Soon!
Algorithms	Strings	Ashton and String	Advanced	Coming Soon!
Algorithms	Strings	String Similarity	Expert	Coming Soon!
Algorithms	Strings	Super Functional Strings	Advanced	Coming Soon!
Algorithms	Strings	Circular Palindromes	Advanced	Coming Soon!
Algorithms	Strings	Similar Strings	Advanced	Coming Soon!
Algorithms	Strings	Save Humanity	Expert	Coming Soon!
Algorithms	Strings	Find Strings	Expert	Coming Soon!
Algorithms	Strings	Palindromic Border	Expert	Coming Soon!
Algorithms	Strings	Two Two	Advanced	Coming Soon!
Algorithms	Strings	Two Strings Game	Expert	Coming Soon!
Algorithms	Strings	Letter Islands	Expert	Coming Soon!
Algorithms	Strings	Pseudo-Isomorphic Substrings	Expert	Coming Soon!
Algorithms	Sorting	Intro to Tutorial Challenges	Easy	Solution.java
Algorithms	Sorting	Insertion Sort - Part 1	Easy	Coming Soon!
Algorithms	Sorting	Insertion Sort - Part 2	Easy	Coming Soon!
Algorithms	Sorting	Correctness and the Loop Invariant	Easy	Coming Soon!
Algorithms	Sorting	Running Time of Algorithms	Easy	Coming Soon!
Algorithms	Sorting	Quicksort 1 - Partition	Easy	Coming Soon!
Algorithms	Sorting	Quicksort 2 - Sorting	Easy	Coming Soon!
Algorithms	Sorting	Quicksort In-Place	Medium	Coming Soon!
Algorithms	Sorting	Running Time of Quicksort	Easy	Coming Soon!
Algorithms	Sorting	Counting Sort 1	Easy	Coming Soon!
Algorithms	Sorting	Counting Sort 2	Easy	Coming Soon!
Algorithms	Sorting	Counting Sort 3	Easy	Coming Soon!
Algorithms	Sorting	The Full Counting Sort	Medium	Coming Soon!
Algorithms	Sorting	Closest Numbers	Easy	Coming Soon!
Algorithms	Sorting	Find the Median	Easy	Coming Soon!
Algorithms	Sorting	Insertion Sort Advanced Analysis	Advanced	Coming Soon!
Algorithms	Sorting	Fraudulent Activity Notifications	Medium	Coming Soon!
Algorithms	Sorting	Lily's Homework	Medium	Coming Soon!
Algorithms	Search	Hackerland Radio Transmitters	Easy	Coming Soon!
Algorithms	Search	Ice Cream Parlor	Easy	Solution.java
Algorithms	Search	Gridland Metro	Medium	Coming Soon!
Algorithms	Search	Missing Numbers	Easy	Coming Soon!
Algorithms	Search	Pairs	Medium	Coming Soon!
Algorithms	Search	Sherlock and Array	Easy	Coming Soon!
Algorithms	Search	Maximum Subarray Sum	Hard	Coming Soon!
Algorithms	Search	Connected Cells in a Grid	Medium	Solution.java
Algorithms	Search	Short Palindrome	Medium	Coming Soon!
Algorithms	Search	Count Luck	Medium	Coming Soon!
Algorithms	Search	Cut the Tree	Medium	Coming Soon!
Algorithms	Search	Making Candies	Hard	Coming Soon!
Algorithms	Search	Gene Playing Hanoi	Medium	Coming Soon!
Algorithms	Search	Beautiful Quadruples	Medium	Coming Soon!
Algorithms	Search	Bike Racers	Hard	Coming Soon!
Algorithms	Search	Task Scheduling	Advanced	Coming Soon!
Algorithms	Search	Similar Pair	Advanced	Coming Soon!
Algorithms	Search	Absolute Element Sums	Hard	Coming Soon!
Algorithms	Search	Sorted Subsegments	Hard	Coming Soon!
Algorithms	Search	King Richard's Knights	Hard	Coming Soon!
Algorithms	Graph Theory	Journey to the Moon	Medium	Coming Soon!
Algorithms	Graph Theory	Synchronous Shopping	Medium	Coming Soon!
Algorithms	Graph Theory	Subset Component	Hard	Coming Soon!
Algorithms	Graph Theory	Breadth First Search - Shortest Reach	Medium	Solution.java
Algorithms	Graph Theory	Kruskal (MST) - Really Special Subtree	Hard	Coming Soon!
Algorithms	Graph Theory	Even Tree	Medium	Coming Soon!
Algorithms	Graph Theory	Snakes and Ladders - The Quickest Way Up	Medium	Coming Soon!
Algorithms	Graph Theory	Dijkstra - Shortest Reach 2	Hard	Coming Soon!
Algorithms	Graph Theory	Prim's (MST) - Special Subtree	Medium	Coming Soon!
Algorithms	Graph Theory	Clique	Medium	Coming Soon!
Algorithms	Graph Theory	Minimum Penalty Path	Medium	Coming Soon!
Algorithms	Graph Theory	Demanding Money	Hard	Coming Soon!
Algorithms	Graph Theory	Jack goes to Rapture	Medium	Coming Soon!
Algorithms	Graph Theory	Crab Graphs	Medium	Coming Soon!
Algorithms	Graph Theory	Bead Ornaments	Advanced	Coming Soon!
Algorithms	Graph Theory	Jeanie's Route	Medium	Coming Soon!
Algorithms	Graph Theory	Floyd - City of Blinding Lights	Hard	Coming Soon!
Algorithms	Graph Theory	Roads in HackerLand	Medium	Coming Soon!
Algorithms	Graph Theory	Kingdom Connectivity	Hard	Coming Soon!
Algorithms	Graph Theory	Computer Game	Hard	Coming Soon!
Algorithms	Graph Theory	Rust & Murderer	Medium	Coming Soon!
Algorithms	Graph Theory	Problem solving	Hard	Coming Soon!
Algorithms	Graph Theory	Journey Scheduling	Hard	Coming Soon!
Algorithms	Graph Theory	Matrix	Hard	Coming Soon!
Algorithms	Graph Theory	Recording Episodes	Hard	Coming Soon!
Algorithms	Graph Theory	Repair Roads	Hard	Coming Soon!
Algorithms	Graph Theory	Kth Ancestor	Hard	Coming Soon!
Algorithms	Graph Theory	ByteLandian Tours	Hard	Coming Soon!
Algorithms	Graph Theory	Find the Path	Hard	Coming Soon!
Algorithms	Graph Theory	Savita And Friends	Hard	Coming Soon!
Algorithms	Graph Theory	Liars	Advanced	Coming Soon!
Algorithms	Graph Theory	Jumping Rooks	Advanced	Coming Soon!
Algorithms	Graph Theory	Tripartite Matching	Hard	Coming Soon!
Algorithms	Graph Theory	Tree Flow	Hard	Coming Soon!
Algorithms	Graph Theory	DAG Queries	Expert	Coming Soon!
Algorithms	Graph Theory	Favorite sequence	Advanced	Coming Soon!
Algorithms	Graph Theory	Jogging Cats	Advanced	Coming Soon!
Algorithms	Graph Theory	Quadrant Queries	Advanced	Coming Soon!
Algorithms	Graph Theory	Hacker Country	Hard	Coming Soon!
Algorithms	Graph Theory	HackerX	Hard	Coming Soon!
Algorithms	Graph Theory	Huarongdao	Expert	Coming Soon!
Algorithms	Graph Theory	Training the army	Hard	Coming Soon!
Algorithms	Graph Theory	Jim and his LAN Party	Hard	Coming Soon!
Algorithms	Graph Theory	Travel in HackerLand	Hard	Coming Soon!
Algorithms	Graph Theory	Alex vs Fedor	Expert	Coming Soon!
Algorithms	Graph Theory	Vertical Paths	Expert	Coming Soon!
Algorithms	Graph Theory	Drive	Expert	Coming Soon!
Algorithms	Graph Theory	Travelling Salesman in a Grid	Expert	Coming Soon!
Algorithms	Graph Theory	Road Network	Expert	Coming Soon!
Algorithms	Graph Theory	Going to the Office	Expert	Coming Soon!
Algorithms	Graph Theory	Tree Splitting	Advanced	Coming Soon!
Algorithms	Graph Theory	Ticket	Expert	Coming Soon!
Algorithms	Greedy	Grid Challenge	Easy	Coming Soon!
Algorithms	Greedy	Luck Balance	Easy	Coming Soon!
Algorithms	Greedy	Maximum Perimeter Triangle	Easy	Coming Soon!
Algorithms	Greedy	Beautiful Pairs	Easy	Coming Soon!
Algorithms	Greedy	Sherlock and The Beast	Easy	Coming Soon!
Algorithms	Greedy	Priyanka and Toys	Easy	Coming Soon!
Algorithms	Greedy	Largest Permutation	Easy	Coming Soon!
Algorithms	Greedy	Mark and Toys	Easy	Coming Soon!
Algorithms	Greedy	Greedy Florist	Medium	Coming Soon!
Algorithms	Greedy	Max Min	Medium	Coming Soon!
Algorithms	Greedy	Jim and the Orders	Easy	Coming Soon!
Algorithms	Greedy	Permuting Two Arrays	Easy	Coming Soon!
Algorithms	Greedy	Cutting Boards	Hard	Coming Soon!
Algorithms	Greedy	Reverse Shuffle Merge	Advanced	Coming Soon!
Algorithms	Greedy	Goodland Electricity	Medium	Coming Soon!
Algorithms	Greedy	Chief Hopper	Hard	Coming Soon!
Algorithms	Greedy	Sherlock and MiniMax	Hard	Coming Soon!
Algorithms	Greedy	Accessory Collection	Hard	Coming Soon!
Algorithms	Greedy	Team Formation	Advanced	Coming Soon!
Algorithms	Greedy	Fighting Pits	Hard	Coming Soon!
Algorithms	Dynamic Programming	The Coin Change Problem	Hard	Solution.java
Algorithms	Dynamic Programming	Equal	Medium	Coming Soon!
Algorithms	Dynamic Programming	Sherlock and Cost	Medium	Coming Soon!
Algorithms	Dynamic Programming	Vertical Sticks	Medium	Coming Soon!
Algorithms	Dynamic Programming	Candies	Medium	Coming Soon!
Algorithms	Dynamic Programming	Angry Children 2	Hard	Coming Soon!
Algorithms	Dynamic Programming	Sam and sub-strings	Medium	Coming Soon!
Algorithms	Dynamic Programming	Fibonacci Modified	Medium	Coming Soon!
Algorithms	Dynamic Programming	Abbreviation	Medium	Coming Soon!
Algorithms	Dynamic Programming	The Maximum Subarray	Medium	Coming Soon!
Algorithms	Dynamic Programming	Fair Cut	Medium	Coming Soon!
Algorithms	Dynamic Programming	HackerRank City	Medium	Coming Soon!
Algorithms	Dynamic Programming	Summing Pieces	Medium	Coming Soon!
Algorithms	Dynamic Programming	Mr K marsh	Medium	Coming Soon!
Algorithms	Dynamic Programming	Substring Diff	Medium	Coming Soon!
Algorithms	Dynamic Programming	Xor and Sum	Medium	Coming Soon!
Algorithms	Dynamic Programming	Lego Blocks	Medium	Coming Soon!
Algorithms	Dynamic Programming	Brick Tiling	Hard	Coming Soon!
Algorithms	Dynamic Programming	Alien Languages	Hard	Coming Soon!
Algorithms	Dynamic Programming	Stock Maximize	Medium	Coming Soon!
Algorithms	Dynamic Programming	Two Robots	Medium	Coming Soon!
Algorithms	Dynamic Programming	Cut Tree	Medium	Coming Soon!
Algorithms	Dynamic Programming	Wet Shark and Two Subsequences	Medium	Coming Soon!
Algorithms	Dynamic Programming	Nikita and the Game	Medium	Coming Soon!
Algorithms	Dynamic Programming	Mandragora Forest	Medium	Coming Soon!
Algorithms	Dynamic Programming	Red John is Back	Medium	Coming Soon!
Algorithms	Dynamic Programming	LCS Returns	Medium	Coming Soon!
Algorithms	Dynamic Programming	Grid Walking	Medium	Coming Soon!
Algorithms	Dynamic Programming	Knapsack	Medium	Coming Soon!
Algorithms	Dynamic Programming	Bricks Game	Medium	Coming Soon!
Algorithms	Dynamic Programming	The Longest Increasing Subsequence	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Coin on the Table	Medium	Coming Soon!
Algorithms	Dynamic Programming	The Longest Common Subsequence	Medium	Coming Soon!
Algorithms	Dynamic Programming	Play with words	Medium	Coming Soon!
Algorithms	Dynamic Programming	Black and White Tree	Hard	Coming Soon!
Algorithms	Dynamic Programming	Counting Special Sub-Cubes	Medium	Coming Soon!
Algorithms	Dynamic Programming	Interval Selection	Medium	Coming Soon!
Algorithms	Dynamic Programming	String Reduction	Hard	Coming Soon!
Algorithms	Dynamic Programming	Far Vertices	Hard	Coming Soon!
Algorithms	Dynamic Programming	Superman Celebrates Diwali	Hard	Coming Soon!
Algorithms	Dynamic Programming	Hexagonal Grid	Medium	Coming Soon!
Algorithms	Dynamic Programming	Queens on Board	Hard	Coming Soon!
Algorithms	Dynamic Programming	Shashank and the Palindromic Strings	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Points in a Plane	Advanced	Coming Soon!
Algorithms	Dynamic Programming	The Indian Job	Medium	Coming Soon!
Algorithms	Dynamic Programming	Requirement	Advanced	Coming Soon!
Algorithms	Dynamic Programming	A Super Hero	Hard	Coming Soon!
Algorithms	Dynamic Programming	Clues on a Binary Path	Hard	Coming Soon!
Algorithms	Dynamic Programming	Road Maintenance	Hard	Coming Soon!
Algorithms	Dynamic Programming	Billboards	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Beautiful Strings	Hard	Coming Soon!
Algorithms	Dynamic Programming	Covering the stains	Hard	Coming Soon!
Algorithms	Dynamic Programming	Fairy Chess	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Travel around the world	Medium	Coming Soon!
Algorithms	Dynamic Programming	New Year Present	Hard	Coming Soon!
Algorithms	Dynamic Programming	Longest Palindromic Subsequence	Hard	Coming Soon!
Algorithms	Dynamic Programming	Candles Counting	Medium	Coming Soon!
Algorithms	Dynamic Programming	Hyper Strings	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Swap Permutation	Medium	Coming Soon!
Algorithms	Dynamic Programming	Extremum Permutations	Medium	Coming Soon!
Algorithms	Dynamic Programming	Square Subsequences	Hard	Coming Soon!
Algorithms	Dynamic Programming	Dorsey Thief	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Mining	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Police Operation	Hard	Coming Soon!
Algorithms	Dynamic Programming	Zurikela's Graph	Hard	Coming Soon!
Algorithms	Dynamic Programming	Modify The Sequence	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Longest Mod Path	Hard	Coming Soon!
Algorithms	Dynamic Programming	P-sequences	Hard	Coming Soon!
Algorithms	Dynamic Programming	Robot	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Lucky Numbers	Expert	Coming Soon!
Algorithms	Dynamic Programming	Unfair Game	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Oil Well	Hard	Coming Soon!
Algorithms	Dynamic Programming	Find the Seed	Advanced	Coming Soon!
Algorithms	Dynamic Programming	The Blacklist	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Tree Pruning	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Ones and Twos	Hard	Coming Soon!
Algorithms	Dynamic Programming	Count Scorecards	Expert	Coming Soon!
Algorithms	Dynamic Programming	Vim War	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Best spot	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Divisible Numbers	Expert	Coming Soon!
Algorithms	Dynamic Programming	Unique Divide And Conquer	Advanced	Coming Soon!
Algorithms	Dynamic Programming	King and Four Sons	Expert	Coming Soon!
Algorithms	Dynamic Programming	Dortmund Dilemma	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Super Kth LIS	Advanced	Coming Soon!
Algorithms	Dynamic Programming	Counting the Ways	Expert	Coming Soon!
Algorithms	Dynamic Programming	Hard Disk Drives	Expert	Coming Soon!
Algorithms	Dynamic Programming	Separate the chocolate	Expert	Coming Soon!
Algorithms	Constructive Algorithms	Flipping the Matrix	Medium	Coming Soon!
Algorithms	Constructive Algorithms	New Year Chaos	Medium	Coming Soon!
Algorithms	Constructive Algorithms	Bonetrousle	Medium	Coming Soon!
Algorithms	Constructive Algorithms	Yet Another KMP Problem	Hard	Coming Soon!
Algorithms	Constructive Algorithms	Beautiful 3 Set	Hard	Coming Soon!
Algorithms	Constructive Algorithms	Inverse RMQ	Hard	Coming Soon!
Algorithms	Constructive Algorithms	Lovely Triplets	Advanced	Coming Soon!
Algorithms	Constructive Algorithms	Array Construction	Advanced	Coming Soon!
Algorithms	Bit Manipulation	Lonely Integer	Easy	Solution.java
Algorithms	Bit Manipulation	Maximizing XOR	Easy	Coming Soon!
Algorithms	Bit Manipulation	Counter game	Medium	Coming Soon!
Algorithms	Bit Manipulation	Xor-sequence	Medium	Coming Soon!
Algorithms	Bit Manipulation	Sum vs XOR	Easy	Coming Soon!
Algorithms	Bit Manipulation	Flipping bits	Easy	Coming Soon!
Algorithms	Bit Manipulation	Yet Another Minimax Problem	Medium	Coming Soon!
Algorithms	Bit Manipulation	Sansa and XOR	Medium	Coming Soon!
Algorithms	Bit Manipulation	AND Product	Medium	Coming Soon!
Algorithms	Bit Manipulation	Xoring Ninja	Hard	Coming Soon!
Algorithms	Bit Manipulation	Cipher	Medium	Coming Soon!
Algorithms	Bit Manipulation	XOR Matrix	Hard	Coming Soon!
Algorithms	Bit Manipulation	What's Next	Medium	Coming Soon!
Algorithms	Bit Manipulation	String Transmission	Hard	Coming Soon!
Algorithms	Bit Manipulation	A or B	Medium	Coming Soon!
Algorithms	Bit Manipulation	Manipulative Numbers	Hard	Coming Soon!
Algorithms	Bit Manipulation	Stone game	Hard	Coming Soon!
Algorithms	Bit Manipulation	2's complement	Advanced	Coming Soon!
Algorithms	Bit Manipulation	Changing Bits	Advanced	Coming Soon!
Algorithms	Bit Manipulation	XOR key	Advanced	Coming Soon!
Algorithms	Bit Manipulation	Maximizing the Function	Hard	Coming Soon!
Algorithms	Bit Manipulation	XOR Subsequences	Advanced	Coming Soon!
Algorithms	Bit Manipulation	Iterate It	Expert	Coming Soon!
Algorithms	Bit Manipulation	Hamming Distance	Expert	Coming Soon!
Algorithms	Bit Manipulation	Mixing proteins	Hard	Coming Soon!
Algorithms	Recursion	Simplified Chess Engine	Medium	Coming Soon!
Algorithms	Recursion	Repetitive K-Sums	Advanced	Coming Soon!
Algorithms	Game Theory	Game of Stones	Easy	Coming Soon!
Algorithms	Game Theory	Tower Breakers	Easy	Coming Soon!
Algorithms	Game Theory	A Chessboard Game	Easy	Coming Soon!
Algorithms	Game Theory	Introduction to Nim Game	Easy	Coming Soon!
Algorithms	Game Theory	Misere Nim	Easy	Coming Soon!
Algorithms	Game Theory	Nimble Game	Easy	Coming Soon!
Algorithms	Game Theory	Poker Nim	Easy	Coming Soon!
Algorithms	Game Theory	Tower Breakers, Revisited!	Medium	Coming Soon!
Algorithms	Game Theory	Tower Breakers, Again!	Medium	Coming Soon!
Algorithms	Game Theory	Chessboard Game, Again!	Medium	Coming Soon!
Algorithms	Game Theory	Digits Square Board	Medium	Coming Soon!
Algorithms	Game Theory	Fun Game	Medium	Coming Soon!
Algorithms	Game Theory	Stone Division	Hard	Coming Soon!
Algorithms	Game Theory	Chocolate in Box	Medium	Coming Soon!
Algorithms	Game Theory	Kitty and Katty	Medium	Coming Soon!
Algorithms	Game Theory	Powers Game	Medium	Coming Soon!
Algorithms	Game Theory	Deforestation	Medium	Coming Soon!
Algorithms	Game Theory	Bob and Ben	Medium	Coming Soon!
Algorithms	Game Theory	Tower Breakers - The Final Battle	Medium	Coming Soon!
Algorithms	Game Theory	Simple Game	Hard	Coming Soon!
Algorithms	Game Theory	Permutation game	Medium	Coming Soon!
Algorithms	Game Theory	Move the Coins	Hard	Coming Soon!
Algorithms	Game Theory	Play on benders	Medium	Coming Soon!
Algorithms	Game Theory	New Year Game	Medium	Coming Soon!
Algorithms	Game Theory	Stone Piles	Hard	Coming Soon!
Algorithms	Game Theory	Chocolate Game	Hard	Coming Soon!
Algorithms	Game Theory	Manasa and Prime game	Hard	Coming Soon!
Algorithms	Game Theory	Vertical Rooks	Medium	Coming Soon!
Algorithms	Game Theory	A stones game	Medium	Coming Soon!
Algorithms	NP Complete	Walking the Approximate Longest Path	Hard	Coming Soon!
Algorithms	NP Complete	Spies, Revisited	Expert	Coming Soon!
Algorithms	NP Complete	TBS Problem	Expert	Coming Soon!

Cracking the Coding Interview

Domain	Subdomain	Topic	Challenge	Difficulty	Solution
Tutorials	Cracking the Coding Interview	Data Structures	Arrays: Left Rotation	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Strings: Making Anagrams	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Hash Tables: Ransom Note	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Linked Lists: Detect a Cycle	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Stacks: Balanced Brackets	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Queues: A Tale of Two Stacks	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Trees: Is This a Binary Search Tree?	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Heaps: Find the Running Median	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Data Structures	Tries: Contacts	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Sorting: Bubble Sort	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Sorting: Comparator	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Merge Sort: Counting Inversions	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	Binary Search: Ice Cream Parlor	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	DFS: Connected Cell in a Grid	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Algorithms	BFS: Shortest Reach in a Graph	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Time Complexity: Primality	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Recrusion: Fibonacci Numbers	Easy	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Recursion: Davis' Staircase	Medium	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	DP: Coin Change	Hard	Solution.java
Tutorials	Cracking the Coding Interview	Techniques / Concepts	Bit Manipulation: Lonely Integer	Easy	Solution.java

Data Structures

Domain	Subdomain	Challenge	Difficulty	Solution
Data Structures	Arrays	Arrays - DS	Easy	Solution.java
Data Structures	Arrays	2D Array - DS	Easy	Solution.java
Data Structures	Arrays	Dynamic Array	Easy	Solution.java
Data Structures	Arrays	Left Rotation	Easy	Solution.java
Data Structures	Arrays	Sparse Arrays	Medium	Solution.java
Data Structures	Arrays	Algorithmic Crush	Hard	Solution.java
Data Structures	Linked List	Print the Elements of a Linked List	Easy	Solution.java
Data Structures	Linked List	Insert a Node at the Tail of a Linked List	Easy	Solution.java
Data Structures	Linked List	Insert a node at the head of a linked list	Easy	Solution.java
Data Structures	Linked List	Insert a node at a specific position in a linked list	Easy	Solution.java
Data Structures	Linked List	Delete a Node	Easy	Solution.java
Data Structures	Linked List	Print in Reverse	Easy	Solution.java
Data Structures	Linked List	Reverse a linked list	Easy	Solution.java
Data Structures	Linked List	Compare two linked lists	Easy	Solution.java
Data Structures	Linked List	Merge two sorted linked lists	Easy	Solution.java
Data Structures	Linked List	Get Node Value	Easy	Solution.java
Data Structures	Linked List	Delete duplicate-value nodes from a sorted linked list	Easy	Solution.java
Data Structures	Linked List	Cycle Detection	Medium	Solution.java
Data Structures	Linked List	Find Merge Point of Two Lists	Easy	Solution.java
Data Structures	Linked List	Inserting a Node Into a Sorted Doubly Linked List	Easy	Solution.java
Data Structures	Linked List	Reverse a doubly linked list	Easy	Solution.java
Data Structures	Trees	Tree: Preorder Traversal	Easy	Solution.java
Data Structures	Trees	Tree: Postorder Traversal	Easy	Solution.java
Data Structures	Trees	Tree: Inorder Traversal	Easy	Solution.java
Data Structures	Trees	Tree: Height of a Binary Tree	Easy	Solution.java
Data Structures	Trees	Tree: Top View	Easy	Solution.java
Data Structures	Trees	Tree: Level Order Traversal	Easy	Solution.java
Data Structures	Trees	Binary Search Tree: Insertion	Easy	Solution.java
Data Structures	Trees	Tree: Huffman Decoding	Medium	Solution.java
Data Structures	Trees	Binary Search Tree: Lowest Common Ancestor	Easy	Solution.java
Data Structures	Trees	Swap Nodes [Algo]	Medium	Solution.java
Data Structures	Trees	Is This a Binary Search Tree?	Medium	Solution.java
Data Structures	Trees	Square-Ten Tree	Hard	Solution.java
Data Structures	Trees	Balanced Forest	Hard	Coming Soon!
Data Structures	Balanced Trees	Self Balancing Tree	Medium	Coming Soon!
Data Structures	Balanced Trees	Array and simple queries	Hard	Coming Soon!
Data Structures	Balanced Trees	Median Updates	Hard	Coming Soon!
Data Structures	Stacks	Maximum Element	Easy	Solution.java
Data Structures	Stacks	Balanced Brackets	Medium	Solution.java
Data Structures	Stacks	Largest Rectangle	Hard	Coming Soon!
Data Structures	Stacks	Simple Text Editor	Medium	Coming Soon!
Data Structures	Stacks	Equal Stacks	Easy	Coming Soon!
Data Structures	Stacks	Poisonous Plants	Hard	Coming Soon!
Data Structures	Stacks	AND xor OR	Hard	Coming Soon!
Data Structures	Stacks	Waiter	Medium	Coming Soon!
Data Structures	Queues	Queue using Two Stacks	Medium	Solution.java
Data Structures	Queues	Castle on the Grid	Medium	Coming Soon!
Data Structures	Queues	Down to Zero II	Medium	Coming Soon!
Data Structures	Queues	Truck Tour	Hard	Coming Soon!
Data Structures	Queues	Queries with Fixed Length	Hard	Coming Soon!
Data Structures	Heap	QHEAP1	Easy	Coming Soon!
Data Structures	Heap	Jesse and Cookies	Easy	Coming Soon!
Data Structures	Heap	Find the Running Median	Hard	Solution.java
Data Structures	Heap	Minimum Average Waiting Time	Hard	Coming Soon!
Data Structures	Disjoint Set	Merging Communities	Hard	Coming Soon!
Data Structures	Disjoint Set	Components in a graph	Medium	Coming Soon!
Data Structures	Disjoint Set	Kundu and Tree	Hard	Coming Soon!
Data Structures	Disjoint Set	Super Maximum Cost Queries	Hard	Coming Soon!
Data Structures	Multiple Choice	Data Structures MCQ 1	Hard	Solution.java
Data Structures	Multiple Choice	Data Structures MCQ 2	Hard	Solution.java
Data Structures	Multiple Choice	Data Structures MCQ 3	Hard	Solution.java
Data Structures	Trie	Contacts	Medium	Solution.java
Data Structures	Trie	No Prefix Set	Hard	Coming Soon!
Data Structures	Advanced	Kindergarten Adventures	Medium	Coming Soon!
Data Structures	Advanced	Cube Summation	Hard	Coming Soon!
Data Structures	Advanced	Mr. X and His Shots	Medium	Coming Soon!
Data Structures	Advanced	Direct Connections	Hard	Coming Soon!
Data Structures	Advanced	Subsequence Weighting	Advanced	Coming Soon!
Data Structures	Advanced	Jim and the Skyscrapers	Medium	Coming Soon!
Data Structures	Advanced	Counting On a Tree	Expert	Coming Soon!
Data Structures	Advanced	Unique Colors	Advanced	Coming Soon!
Data Structures	Advanced	Self-Driving Bus	Advanced	Coming Soon!
Data Structures	Advanced	Fibonacci Numbers Tree	Expert	Coming Soon!
Data Structures	Advanced	Functional Palindromes	Advanced	Coming Soon!
Data Structures	Advanced	Lazy White Falcon	Hard	Coming Soon!
Data Structures	Advanced	Ticket to Ride	Expert	Coming Soon!
Data Structures	Advanced	Heavy Light White Falcon	Hard	Coming Soon!
Data Structures	Advanced	Sum of the Maximums	Advanced	Coming Soon!
Data Structures	Advanced	Heavy Light 2 White Falcon	Hard	Coming Soon!
Data Structures	Advanced	Library Query	Advanced	Coming Soon!
Data Structures	Advanced	Starfleet	Advanced	Coming Soon!
Data Structures	Advanced	Almost Equal - Advanced	Expert	Coming Soon!
Data Structures	Advanced	Almost sorted interval	Expert	Coming Soon!
Data Structures	Advanced	Burger Happiness	Hard	Coming Soon!
Data Structures	Advanced	Roy and alpha-beta trees	Hard	Coming Soon!
Data Structures	Advanced	Coloring Tree	Hard	Coming Soon!
Data Structures	Advanced	Recalling Early Days GP with Trees	Hard	Coming Soon!
Data Structures	Advanced	Swaps and Sum	Advanced	Coming Soon!
Data Structures	Advanced	Arithmetic Progressions	Advanced	Coming Soon!
Data Structures	Advanced	Coolguy and Two Subsequences	Advanced	Coming Soon!
Data Structures	Advanced	White Falcon And Tree	Hard	Coming Soon!
Data Structures	Advanced	Subtrees And Paths	Advanced	Coming Soon!
Data Structures	Advanced	Triplets	Advanced	Coming Soon!
Data Structures	Advanced	Beautiful Segments	Expert	Coming Soon!
Data Structures	Advanced	Divisibility	Expert	Coming Soon!
Data Structures	Advanced	BST maintenance	Advanced	Coming Soon!
Data Structures	Advanced	Find Maximum Index Product	Medium	Coming Soon!
Data Structures	Advanced	Taxicab Driver's Problem	Advanced	Coming Soon!
Data Structures	Advanced	Jaggu Playing with Balloons	Advanced	Coming Soon!
Data Structures	Advanced	Dynamic Summation	Hard	Coming Soon!
Data Structures	Advanced	Two Array Problem	Hard	Coming Soon!
Data Structures	Advanced	Rooted Tree	Hard	Coming Soon!
Data Structures	Advanced	The crazy helix	Advanced	Coming Soon!
Data Structures	Advanced	Network administration	Hard	Coming Soon!
Data Structures	Advanced	Easy Addition	Expert	Coming Soon!
Data Structures	Advanced	Find the permutation	Expert	Coming Soon!
Data Structures	Advanced	Company Retreat	Advanced	Coming Soon!

Java

Domain	Subdomain	Challenge	Difficulty	Solution
Java	Introduction	Welcome to Java!	Easy	Solution.java
Java	Introduction	Java Stdin and Stdout I	Easy	Solution.java
Java	Introduction	Java If-Else	Easy	Solution.java
Java	Introduction	Java Stdin and Stdout II	Easy	Solution.java
Java	Introduction	Java Output Formatting	Easy	Solution.java
Java	Introduction	Java Loops I	Easy	Solution.java
Java	Introduction	Java Loops II	Easy	Solution.java
Java	Introduction	Java Datatypes	Easy	Solution.java
Java	Introduction	Java End-of-file	Easy	Solution.java
Java	Introduction	Java Static Initializer Block	Easy	Solution.java
Java	Introduction	Java Int to String	Easy	Solution.java
Java	Introduction	Java Date and Time	Easy	Solution.java
Java	Introduction	Java Currency Formatter	Easy	Solution.java
Java	Strings	Java Strings Introduction	Easy	Solution.java
Java	Strings	Java Substring	Easy	Solution.java
Java	Strings	Java String Compare	Easy	Solution.java
Java	Strings	Java String Reverse	Easy	Solution.java
Java	Strings	Java Anagrams	Easy	Solution.java
Java	Strings	Java String Tokens	Easy	Solution.java
Java	Strings	Pattern Syntax Checker	Easy	Solution.java
Java	Strings	Java Regex	Medium	Solution.java
Java	Strings	Java Regex 2 - Duplicate Words	Easy	Solution.java
Java	Strings	Java Regex 3 - Username Checker	Medium	Solution.java
Java	Strings	Tag Content Extractor	Medium	Solution.java
Java	BigNumber	Java BigInteger	Easy	Solution.java
Java	BigNumber	Java BigDecimal	Medium	Solution.java
Java	BigNumber	Java Primality Test	Easy	Solution.java
Java	Data Structures	Java 1D Array	Easy	Solution.java
Java	Data Structures	Java 2D Array	Easy	Solution.java
Java	Data Structures	Java Subarray	Easy	Solution.java
Java	Data Structures	Java Arraylist	Easy	Solution.java
Java	Data Structures	Java 1D Array (Part 2)	Medium	Solution.java
Java	Data Structures	Java List	Easy	Solution.java
Java	Data Structures	Java Map	Easy	Solution.java
Java	Data Structures	Java Stack	Medium	Solution.java
Java	Data Structures	Java Hashset	Easy	Solution.java
Java	Data Structures	Java Generics	Easy	Solution.java
Java	Data Structures	Java Comparator	Medium	Solution.java
Java	Data Structures	Java Sort	Easy	Solution.java
Java	Data Structures	Java Dequeue	Medium	Solution.java
Java	Data Structures	Java BitSet	Easy	Solution.java
Java	Data Structures	Java Priority Queue	Medium	Solution.java
Java	Object Oriented Programming	Java Inheritance I	Easy	Solution.java
Java	Object Oriented Programming	Java Inheritance II	Easy	Solution.java
Java	Object Oriented Programming	Java Abstract Class	Easy	Solution.java
Java	Object Oriented Programming	Java Interface	Easy	Solution.java
Java	Object Oriented Programming	Java Method Overriding	Easy	Solution.java
Java	Object Oriented Programming	Java Method Overriding 2 (Super Keyword)	Easy	Solution.java
Java	Object Oriented Programming	Java Instanceof keyword	Easy	Solution.java
Java	Object Oriented Programming	Java Iterator	Easy	Solution.java
Java	Object Oriented Programming	Calculating Volume	Medium	Solution.java
Java	Exception Handling	Java Exception Handling (Try-catch)	Easy	Solution.java
Java	Exception Handling	Java Exception Handling	Easy	Solution.java
Java	Advanced	Java Varargs - Simple Addition	Easy	Solution.java
Java	Advanced	Java Reflection - Attributes	Easy	Solution.java
Java	Advanced	Can You Access	Medium	Solution.java
Java	Advanced	Prime Checker	Medium	Solution.java
Java	Advanced	Java Factory Pattern	Easy	Solution.java
Java	Advanced	Java Singleton Pattern	Easy	Solution.java
Java	Advanced	Java Visitor Pattern	Medium	Solution.java
Java	Advanced	Java Annotations	Medium	Solution.java
Java	Advanced	Covariant Return Types	Easy	Solution.java
Java	Advanced	Java Lambda Expressions	Medium	Solution.java
Java	Advanced	Java MD5	Medium	Solution.java
Java	Advanced	Java SHA-256	Medium	Solution.java