Java Programming Coding Challenges, Exercises and Solutions – Your Step-by-Step Guide to Conquering Java Interview Questions.
Thinking about a career in Java programming? Or maybe you’re preparing for that all-important Java interview? We’ve got just the course for you!
In our Java Programming Coding Challenges, we go beyond traditional courses to offer a detailed, hands-on experience. Here’s a glimpse of what you’ll encounter:
- Learning Objectives:
Each challenge is centered around a unique learning objective, ensuring you gain a clear understanding of specific Java techniques and methodologies.
- Engaging Introduction:
Before diving in, we set the stage with an intriguing introduction for every task. It’s not just about coding; it’s about understanding the ‘why’ behind each challenge.
- In-depth Instructions:
You’re never left in the dark. Each Java challenge comes with comprehensive instructions, ensuring clarity and focus as you approach each problem.
- Explicit Requirements:
We outline the precise requirements your Java code should meet. This clarity helps narrow down your approach, ensuring that your solutions are always on point.
- Defined Input/Output:
Through detailed input-output specifications, you’ll grasp Java’s data handling nuances, mastering how to manipulate, process, and return data.
- Realistic Examples:
Our Java coding challenges come alive with practical examples, bridging the gap between theory and real-world application. These examples serve as a guiding beacon, shedding light on potential solutions.
- Concise Constraints:
True coding expertise is about working within limits. Our challenges come with defined constraints, pushing you to craft both efficient and effective Java code.
- Expected Time Complexity & Auxiliary Space:
Our unique feature! For each challenge, we delve into the expected time complexity and auxiliary space. This fosters an understanding of Java optimization, ensuring your solutions are not just correct, but also efficient.
- Helpful Hints:
If a challenge proves formidable, our tailored hints are there to gently guide you. Available after two unsuccessful attempts, they provide just enough information to nudge you forward without giving away the entire solution.
- Key Notes:
Sprinkled throughout are essential notes, enriching your understanding and offering insights that can make all the difference in your coding approach.
- Starter File with Commented Code:
Jumpstart your coding with our starter files. Infused with helpful comments, these files pave the way for a smooth coding experience, emphasizing Java best practices from the get-go.
- Engaging and Detailed Hints:
Should a challenge remain elusive after a couple of tries, our expansive hints come to the rescue. These aren’t just cursory tips; they are in-depth guides designed to bolster your understanding and refine your approach.
- Exhaustive Solution Explanations with Reference Links:
After your third attempt, we unveil a thorough solution explanation, brimming with insights from Java experts. But there’s more! Embedded within these solutions are reference links, directing you to further readings and resources. This allows you to deepen your understanding, exploring the intricacies of each solution in a broader Java context.
What Will You Find Inside This Course?
- Challenges For All Levels:
From beginners just starting out, to pros looking for a real test, we’ve got challenges in four sections: easy, medium, hard, and expert. There’s something for everyone!
- Clear Instructions for Each Challenge:
Every challenge is laid out simply, with:
- A quick overview to get you started.
- Easy-to-follow steps.
- Clear requirements, so you know what’s expected.
- Sample input & output.
- Real-life examples.
- Helpful hints if you get stuck.
- Hints & Solutions:
If a challenge has you scratching your head, don’t worry! We’ve got detailed hints to guide you. And once you’re ready, there’s a complete solution with:
- Code solutions to understand the correct approach.
- A simple explanation, so you know how the solution works.
- Additional resources if you want to learn more.
Why Choose This Course?
- Full Range of Challenges:
You won’t just learn the basics. You’ll dive deep into Java, exploring everything from simple tasks to complex problems.
- Learn By Doing:
It’s not just about reading and watching. You’ll actively solve challenges, making sure you really understand.
- Prepare For Real Interviews:
These challenges are similar to what companies ask in interviews. By the end, you’ll be ready for anything they throw at you!
- Learn At Your Own Speed:
Whether you have lots of time or just a little, you can work through the course at your own pace.
Java Coding Challenges Course Features:
- Monthly Updates:
Stay updated with the latest Java developments and challenges. Our course is refreshed monthly to ensure relevance and to introduce new, exciting coding problems.
- Progress Tracking:
Monitor your journey with our built-in progress tracker. Know what you’ve accomplished and what lies ahead, helping you pace your learning effectively.
- Dedicated Support:
Got a question? Facing an issue? Our dedicated support team is on standby to assist you, ensuring a smooth and uninterrupted learning experience.
- Certificate of Completion:
On conquering the course, you’ll earn a certificate, a testament to your newfound Java prowess, perfect for showcasing on your CV or LinkedIn profile.
- Interactive Code Environment:
Code, compile, and run your solutions within our platform. No need for external tools – everything you need is right here.
- Peer Collaboration:
Engage with a community of learners. Share solutions, discuss problems, and learn collaboratively.
- Expert Insights:
Access occasional webinars and Q&A sessions with Java experts, providing deeper insights and addressing trending Java topics.
- Real-World Simulations:
Our challenges don’t just test your Java knowledge; they mimic real-world scenarios, ensuring practical and applicable skills.
- Adaptive Learning Path:
The course adjusts to your pace and proficiency, ensuring challenges always match your skill level, offering a consistently engaging experience.
Who Should Join?
- Advanced coders looking for some challenging problems.
- Those with some Java knowledge wanting to brush up on their skills.
- Total beginners wanting to learn Java the fun way.
- Anyone getting ready for job interviews that involve Java.
Java Coding Challenges FAQs:
What is the primary objective of the Java Coding Challenges course?
The course is designed to immerse learners in the world of Java through a series of thoughtfully curated coding challenges. The primary objective is to bridge the gap between theoretical knowledge and practical application, ensuring that learners not only understand Java concepts but also know how to implement them in real-world scenarios.
Is the Java Coding Challenges course suitable for beginners?
Absolutely. The course has been structured to cater to a wide range of skill levels. With challenges segmented into easy, medium, hard, and expert levels, beginners can start with simpler problems and gradually move on to more complex challenges as they advance.
Do I need any prior knowledge of Java to start the Java Coding Challenges course?
It’s advantageous to have a foundational understanding of Java. However, the course is accommodating even to those new to the language. The initial challenges introduce basic concepts, ensuring that everyone, regardless of their starting point, has the opportunity to learn and grow.
How often is the content in Java Coding Challenges updated?
To ensure the course remains contemporary and aligned with the latest developments in Java, we update the content monthly. This not only introduces fresh challenges but also ensures that any new features or changes in Java are incorporated.
Can I track my progress throughout the Java Coding Challenges course?
Yes, one of the key features of the course is its built-in progress tracker. This tool allows learners to see at a glance which challenges they’ve completed, which are pending, and their overall progression through the course.
Will I receive a certificate upon completing the Java Coding Challenges course?
Certainly! Once you’ve conquered all the challenges, you’ll be awarded a certificate to recognize your accomplishments and Java expertise. This certificate can be a valuable addition to your professional portfolio.
How is the Java Coding Challenges course different from other Java courses online?
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This course stands out due to its hands-on challenge-centric approach. Instead of merely watching videos or reading texts, learners actively engage with problems, encouraging deeper understanding and retention. Features like expected time complexity, auxiliary space considerations, and detailed hints further enhance the learning experience.
I’m an experienced Java developer. Will I find the Java Coding Challenges course beneficial?
Absolutely. While the course is suitable for beginners, it also presents intricate challenges meant for advanced learners. These challenges can help seasoned Java developers test their skills, explore new problem-solving strategies, and stay sharp.
Is there any dedicated support if I face issues during the Java Coding Challenges course?
Yes. We understand the importance of timely assistance, especially when grappling with complex challenges. A dedicated support team is always available to answer queries, provide clarifications, or assist with any technical issues.
Does the Java Coding Challenges course provide starter code for challenges?
Indeed. To streamline the problem-solving process and offer guidance, each challenge is accompanied by a starter code. This not only helps in understanding the problem’s requirements but also provides a foundation on which learners can build their solutions.
Are there any real-world applications or projects in the Java Coding Challenges course?
While the primary focus is on individual challenges, these problems are designed to mimic real-world scenarios. As a result, learners gain practical skills and insights they can readily apply in professional or personal projects.
How long will I have access to the Java Coding Challenges course once I enroll?
Upon enrolling, learners typically gain lifetime access to the course content. This means you can revisit challenges, explore solutions, and utilize the course resources at any time, even after completing all the challenges.
Are there any prerequisites or software installations needed for the Java Coding Challenges course?
While the course itself is self-contained, learners might benefit from having a basic Java development environment set up on their computers. This allows them to experiment, practice, and test solutions outside the confines of the course platform.
Will the Java Coding Challenges course prepare me for Java certification exams?
Yes. The skills and insights gained from this course will undoubtedly assist learners preparing for certification exams. The hands-on problem-solving experience provides a strong foundation for any Java-related challenge or test.
Does the Java Coding Challenges course cover Java’s latest features and updates?
With our commitment to monthly updates, we ensure that the course incorporates the latest features, changes, and updates related to Java. This commitment ensures learners always have access to the most current and relevant content.
Interested in expanding your Java skills and taking on exciting coding challenges?
Don’t miss out on this opportunity. Enroll now in the Java Coding Challenges course and embark on a rewarding journey of hands-on Java learning.
Your path to mastering Java begins here. Enroll Now!
Java Easy Coding Challenges
Introduction
Finding the Smallest Element – Array Operations
Counting Vowels – String Operations
Calculating String Length – String Operations
Reversing a String – String Operations
Finding the Second Largest Element – Array Operations
Factorial Computation – Recursion
Remove Spaces from a String – String Manipulation
Swap Two Numbers – Without Using Third Variable
Count Number of Digits – Mathematical Approach
Compute Nth Fibonacci Number – Recursion and Memoization
Toggle Case of Characters – String Operations
Count Digit Frequency – Number Operations
Separate 0’s and 1’s from an Array – Array Segregation
Separate Even and Odd Numbers – Array Manipulation
Counting Capital Letters – String Manipulation
Sum of Largest and Smallest Element in an Array – Array Operations
Recursive Exponentiation
Reverse an Array – Without Using the reverse() Method
Palindrome Check – String Verification
Anagram Check – String Comparison
Finding First and Last Occurrence – Array Operations
Calculate Area of a Rectangle – Object-Oriented Programming
Convert Kilometers to Miles – Basic Operations
Calculate Profit or Loss – Basic Operations
Body Mass Index Calculation – Arithmetic Operations
Convert Fahrenheit to Celsius – Temperature Conversion
Calculating Volume – Cube Operations
Swap Two Numbers – Variable Operations
Calculate Simple Interest – Basic Mathematics
Check Even or Odd – Basic Conditional Statements
Find Youngest Brother – Class and Object Operations
Printing FizzBuzz – Loop and Conditional Statements
Maximum Possible Handshakes – Combinatorics
Divide Chocolates Among Children – Array Operations
Convert Pound to Kilogram – Data Type and Conversion Operations
Grade Evaluation – Conditional Logic
Grade Students – Control Flow Statements
Check Eligibility for Voting – Conditional Operations
Employee Bonus – Class and Object Handling
Sum of Natural Numbers – Iteration and Recursion
Check Leap Year – Date and Time Operations
Repeat a Sentence – String Operations
Generating Multiplication Table – Control Flow and Loops
Factorial of a Number – Recursion
Add Numbers – Basic Operations
Armstrong Number – Number Manipulations
Finding the Greatest Factor – Number Operations
Numbers Except Multiple of 8 – Control Structures and Loops
Count Number of Digits – Mathematical Operations
Factor of Number – Number Theory
Power of Number – Mathematical Operations
Internal Angles of a Triangle – Geometry Basics
Sum of All Digits – Number Manipulation
Harshad Number – Number Properties
Identifying Abundant Numbers – Number Theory
Check if Two Arguments are Equal – Equality Check
Use Same Method Twice – Method Invocation
Area of Circle – Geometry Basics
Calculate Simple Interest – Mathematical Operations
Reverse a Number – Number Manipulation
Palindrome Number – Number Operations
Check Prime Number – Number Theory
Self-Dividing Number – Number Manipulation
GCD of Two Numbers – Mathematical Operations
LCM of Two Numbers – Mathematical Operations
Find Longer String – String Comparison
Join Two Strings – String Manipulation
Access String Characters – String Manipulation
Check Whether a Number is Prime or Not – Number Theory
Prime Numbers Between Intervals – Number Theory
Number of Vowels – String Operations
Check if Two Strings are Equal – String Comparison
Print Non-Alphabet Characters – String Manipulation
Convert First Letter to Uppercase – String Manipulation
Print Individual Elements – Array Operations
Compare First and Last Array Elements – Array Operations
Mean Height of Players – Mathematical Operations
Standard Deviation – Statistical Operations
Even Numbers From Array – Array Operations
Find Percentage – Mathematical Operations
Smallest Array Element – Array Basics
Multiply Array by 10 – Array Operations
Read N Characters Given Read4 – File Operations
Missing Ranges – Array Operations
Two Sum III – Data structure design
Strobogrammatic Number – Number Manipulation
Meeting Rooms – Interval Scheduling
Palindrome Permutation – String Manipulation
Closest Binary Search Tree Value – Binary Search Tree Operations
Moving Average from Data Stream – Data Structure Design
Logger Rate Limiter – Data Structures and Design
Friend Requests I: Overall Acceptance Rate – Database Queries
Consecutive Available Seats – Database Operations
Design Compressed String Iterator – Data Structure Implementation
Shortest Distance in a Line – Geometry and Array Operations
Sentence Similarity – String Processing
Find Anagram Mappings – String and Array Manipulation
Confusing Number – Number Manipulation
Two Sum Less Than K – Array Operations
Reported Posts – Data Structures & Algorithms
Java Medium Challenges
Java Medium Challenges Introduction
Find Unique Character – String Operations
Palindrome Check – String Operations
Single Number – Bit Manipulation
Add Two Numbers – Basic Arithmetic
Longest Substring Without Repeating Characters – String Manipulation
Finding the Longest Palindromic Substring – String Operations
Zigzag Pattern Conversion – String Operations
Reversing an Integer – Number Operations
Converting String to Integer – String Parsing and Validation
Finding the Container With Most Water – Array Operations
Convert Integer to Roman Numerals – Number Systems
Calculating the 3Sum – Array Operations
Generating Letter Combinations of a Phone Number – Recursion and Backtracking
Finding Quadruplets with a Given Sum – Array Manipulation
Removing the Nth Node from End – Linked List Operations
Swapping Nodes in Pairs – LinkedList Operations
Divide Two Integers – Mathematical Operations
Generate Next Permutation – String Operations
Search in Rotated Sorted Array – Array Operations
Find First and Last Position of Element in Sorted Array – Binary Search
Valid Sudoku – Matrix Operations
Count and Say – String Manipulation
Multiply Strings – String Manipulation and Arithmetic Operations
Permutations – Backtracking
Rotate Image – Matrix Operations
Group Anagrams – String and Hashing
Maximum Subarray – Array Manipulation
Generating Spiral Matrix – Matrix Operations
Overcoming Hurdles – Array Traversal
Merge Overlapping Intervals – Array Operations
Insert New Interval – List Manipulation
Generating Spiral Matrix – Matrix Operations
Rotate List – Linked List Operations
Unique Paths – Matrix Navigation
Edit Distance – Dynamic Programming
Set Matrix Zeroes – Matrix Operations
Search a 2D Matrix – Matrix Operations
Sort Colors – Array Manipulation
Word Search – Matrix Operations
Remove Duplicates from Sorted Array – Array Manipulation
Search in Rotated Sorted Array II – Array Manipulations
Remove Duplicates from Sorted List II – Linked List Operations
Partition List – LinkedList Operations
Gray Code – Bit Manipulation
Subsets II – Recursive Backtracking
Decode Ways – Dynamic Programming
Reverse Linked List II – Linked List Manipulation
Unique Binary Search Trees – Binary Search Trees (BST)
Interleaving String – String Manipulation
Validate Binary Search Tree – Tree Operations
Recover Binary Search Tree – Tree Operations
Binary Tree Level Order Traversal – Tree Operations
Binary Tree Zigzag Level Order Traversal – Binary Trees
Construct Binary Tree from Preorder and Inorder Traversal – Tree Operations
Construct Binary Tree from Inorder and Postorder Traversal – Tree Construction
Binary Tree Level Order Traversal II – Binary Trees
Convert Sorted List to Binary Search Tree – Data Structures
Path Sum II – Tree Traversal
Flatten Binary Tree to Linked List – Tree Operations
Populating Next Right Pointers in Each Node – Tree Operations
Populating Next Right Pointers in Each Node II – Binary Tree Operations
Determining Triangle Type – Geometrical Shapes
Best Time to Buy and Sell Stock II – Stock Trading
Longest Consecutive Sequence – Array Operations
Sum Root to Leaf Numbers – Binary Trees
Surrounded Regions – Graph Traversal
Palindrome Partitioning – String Manipulations
Clone Graph – Graph Operations
Copy List with Random Pointer – LinkedList Operations
Word Break – Dynamic Programming
Reorder List – Linked List Manipulation
Implementing LRU Cache – Data Structure Design
Insertion Sort List – LinkedList Operations
Sort List – List Operations
Reverse Words in a String – String Manipulation
Find Minimum in Rotated Sorted Array – Array Manipulation
Min Stack – Stack Operations
Compare Version Numbers – String Manipulation
Fraction to Recurring Decimal – Mathematical Operations
Factorial Trailing Zeroes – Mathematics and Factorization
Binary Search Tree Iterator – Data Structures
Rank Scores – Database Operations
Largest Number – Array Operations
Consecutive Numbers – Sequence Analysis
Repeated DNA Sequences – String Manipulation
Rotate Array – Array Transformations
Word Frequency – String Operations
Transpose File – File Operations
House Robber – Dynamic Programming
Binary Tree Right Side View – Tree Traversal
Number of Islands – Graph Algorithms
Count Primes – Number Theory
Course Schedule – Graph Theory
Implement Trie (Prefix Tree) – Data Structure Design
Minimum Size Subarray Sum – Array Operations
Course Schedule II – Graphs and Topological Sorting
Maximal Square – Matrix Operations
Count Complete Tree Nodes – Binary Trees
Rectangle Area – Geometry and Classes
Lowest Common Ancestor of a Binary Search Tree – Tree Operations
Java Hard Coding Challenges
Java Hard Coding Challenges Introduction
Check If A Given String Is A Palindrome – String Manipulation
Counting Words in a String – HashMap Operations
Check for Valid Email Address – String Operations
Generating Permutations – String Operations
Combinations of List Elements – Target Sum Computation
Create and Add Elements – ArrayList Operations
Adding Elements to Specific Index – ArrayList Operations
Modify Elements – ArrayList Operations
Remove Elements From ArrayList – ArrayList Operations
Adding Elements to LinkedList – LinkedList Operations
Accessing Elements – LinkedList Operations
Implementing Queue Using LinkedList – Data Structures & Algorithms
Implement Dequeue – Data Structure Operations
Find Intersection – HashSet Operations
Finding Difference of Sets – Set Operations
Accessing Elements – HashMap Operations
Modifying HashMap Elements – Map Operations
Removing Elements from a HashMap – HashMap Operations
Sort Ages – List Operations
Minimum and Maximum Marks – Object-Oriented Programming
Finding Nemo – String Search Operations
Creating an Enum Class – Java Enumerations
Representing Enum Constants – String Operations
Printing Value – Data Type Handling
Print Any Type of Data – Generics
Convert the Primitive Type to Wrapper Class Object – Java Object & Classes
Using Lambda Expressions – Lambda Expression with Parameters
Group Shifted Strings – String Manipulation
Count Univalue Subtrees – Tree Traversal
Flatten 2D Vector – Data Structure Operations
Generating Factor Combinations – Algorithm Techniques
Verify Preorder Sequence in Binary Search Tree – Tree Traversal
Graph Valid Tree – Graph Theory
Encode and Decode Strings – String Manipulation
Find the Celebrity – Matrix Operations
Wiggle Sort – Array Manipulation
Zigzag Iterator – Advanced Data Structures
Inorder Successor in BST – Tree Traversal
Sparse Matrix Multiplication – Matrix Operations
Binary Tree Vertical Order Traversal – Tree Operations
Generalized Abbreviation – Recursion and Backtracking
Maximum Size Subarray Sum Equals k – Array Operations
Nested List Weight Sum – List Operations
Sort Transformed Array – Array Operations
Design Hit Counter – Data Structures and Algorithms
Find Leaves of Binary Tree – Binary Tree Traversal
Range Addition – Array Manipulation
Convert Binary Search Tree to Sorted Doubly Linked List – Tree and LinkedList Operations
Sequence Reconstruction – Graph Theory and Topological Sorting
Find Permutation – String Manipulation
The Maze – Graph Traversal
Boundary of Binary Tree – Tree Traversal
Longest Line of Consecutive One – Matrix Operations
Winning Candidate – Election Analysis
Kill Process – Tree Operations
Shortest Distance in a Plane – Geometry and Arrays
Second Degree Follower – Graphs & Networks
Add Bold Tag in String – String Manipulation
Minimum Factorization – Number Theory
Find the Derangement of An Array – Array Manipulations
Design Log Storage System – Data Structure Design
4 Keys Keyboard – Dynamic Programming
Equal Tree Partition – Tree Operations
Number of Distinct Islands – Graphs and DFS
Search in a Sorted Array of Unknown Size – Array Operations
Insert into a Sorted Circular Linked List – Linked List Operations
Candy Crush – Game Mechanics
Bold Words in String – String Manipulation
Split BST – Binary Search Trees
Shortest Way to Form String – String Manipulation
Campus Bikes – Greedy Algorithms
Brace Expansion – String Manipulation
Unpopular Books – Library Analysis
Path With Maximum Minimum Value – Graphs and Matrices
New Users Daily Count – Data Analysis
Highest Grade For Each Student – Data Manipulation
Maximum Average Subtree – Binary Trees
Active Businesses – Database Operations
Design File System – Data Structures and OOP
Design Bounded Blocking Queue – Data Structures and Concurrency
Find Smallest Common Element in All Rows – Matrix Operations
Team Scores in Football Tournament – Data Handling
Two Sum BSTs – Tree Operations
Tree Diameter – Binary Tree Operations
Smallest Common Region – Graphs and Trees
Page Recommendations – Data Structures and Algorithms
All People Report to the Given Manager – Graph Traversal
Remove Interval – List Operations
Find the Start and End Number of Continuous Ranges – Array Manipulation
Running Total for Different Genders – Data Operations
Activity Participants – Data Structures and Logic
Number of Trusted Contacts of a Customer – Data Structures and Algorithms
Customers Who Bought Products A and B but Not C – Database Operations
Leftmost Column with at Least a One – Matrix Operations
First Unique Number – Array Operations
Active Users – Data Filtering
Calculate Salaries – Payroll Management
Design a File Sharing System – Object-Oriented Design
Countries You Can Safely Invest In – Decision Making
Find Root of N-Ary Tree – Tree Operations
Java Expert Coding Challenges
Java Expert Coding Challenges Introduction
Java Expert Coding Sample Challenge 1
Java Expert Coding Sample Challenge 2
Implementing Inheritance – Object-Oriented Programming
Multiple Classes Inherits a Class – Object-Oriented Programming
Override Method of Parent Class – Object-Oriented Programming
Override Method in Multiple Classes – Object-Oriented Programming
Access Overridden Method of Superclass – Object-Oriented Programming
Implement Multilevel Inheritance – Object-Oriented Programming
Method Overloading with Parameter Types – OOP Concepts
Method Overloading with Parameter Number – Advanced Java Concepts
IcyHot Temperature – Conditional Logic
Overloading vs Overriding – Concepts of Polymorphism
Access Superclass Constructor – Object-Oriented Programming
Access Static Properties within Class – Class Fundamentals
Check Instance of a Class – Object Oriented Programming
Range Sum Query 2D – Mutable – Matrix Operations
Optimal Account Balancing – Advanced Problem Solving
Find Cumulative Salary of an Employee – Array Operations
Students Report By Geography – Database Operations
Design Excel Sum Formula – Data Structures & Algorithms
Minimum Window Subsequence – String Operations
Employee Free Time – Interval Management
User Purchase Platform – Data Structures
Tournament Winners – Data Structures and Algorithms
Number of Transactions per Visit – Data Analysis
Get the Second Most Recent Activity – List Manipulation
Total Sales Amount by Year – Data Processing
Find the Quiet Students in All Exams – Exam Analysis
Sales by Day of the Week – Data Analysis
Move Sub-Tree of N-Ary Tree – Tree Operations
Build Binary Expression Tree From Infix Expression – Tree Operations
Find the Subtasks That Did Not Execute – List Manipulations
First and Last Call On the Same Day – Date Manipulations
The Number of Seniors and Juniors to Join the Company – Data Analysis
Build the Equation – String Manipulation
Choose Numbers From Two Arrays in Range – Array Manipulation
Amount of New Area Painted Each Day – Mathematical Operations
Finding the Topic of Each Post – Text Processing
Distance to a Cycle in Undirected Graph – Graph Operations
Dynamic Pivoting of a Table – Data Manipulation
Dynamic Unpivoting of a Table – Database Operations
Closest Node to Path in Tree – Tree Operations
Check for Contradictions in Equations – Logical Operations
Merge Overlapping Events – Interval Merging
Count the Number of K-Big Indices – Array Analysis
Maximum Frequency Score of a Subarray – Array Operations
Time Taken to Cross the Door – Problem Solving
Beautiful Pairs – Array Operations
Immutability Helper – Object Operations
Consecutive Transactions with Increasing Amounts – Transaction Analysis
Minimum Operations to Make Numbers Non-positive – Array Operations
Find Shortest Path with K Hops – Graph Algorithms
Clone Binary Tree With Random Pointer – Advanced Data Structures
