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Adding Two Numbers Represented by Linked Lists
Learn how to add two numbers represented by linked lists using an efficient O(n + m) approach. Understand the concept, reversing linked lists, carry handling, and Java solution with detailed explanation.
Brackets in Matrix Chain Multiplication
Learn how to solve the Matrix Chain Multiplication Brackets problem using Dynamic Programming. Understand the concept, optimal parenthesization, DP table construction, and Java implementation to print the minimum-cost multiplication order.
Remove K Digits Problem – Greedy Stack Approach to Find the Smallest Number
Learn how to solve the “Remove K Digits” problem using a greedy monotonic stack approach. This article explains how to efficiently remove k digits from a number string to form the smallest possible result while maintaining digit order, along with a Java implementation and clear intuition.
Count Subset With Target Sum II – Meet in the Middle Java Solution
Learn how to solve Count Subset With Target Sum II using the Meet in the Middle technique. Includes intuition, dry run, complexity analysis, and optimized Java code.
Expression Contains Redundant Bracket or Not – Java Stack Solution Explained
Learn how to detect redundant brackets in an expression using a stack. Includes intuition, dry run, complexity analysis, and optimized Java O(n) solution.
Candy Problem in Java – Greedy O(n) Time and O(1) Space Solution
earn how to solve the Candy problem using an optimal greedy algorithm. Includes intuition, dry run, complexity analysis, and Java solution with O(n) time and O(1) space.
Palindrome Pairs in an Array of Strings – Java Solution with HashMap
Learn how to solve the Palindrome Pairs problem using HashMap and palindrome prefix-suffix checking. Includes intuition, dry run, complexity analysis, and optimized Java code.
Lexicographically Smallest String After Removing K Characters Using a Monotonic Stack
Learn how to find the lexicographically smallest string after removing K characters using a monotonic stack in Java. Includes explanation, dry run, and optimized O(n) solution.
Next Element With Greater Frequency – Java O(n) Stack Solution
Learn how to solve the Next Element With Greater Frequency problem using HashMap and Monotonic Stack. Includes intuition, dry run, complexity analysis, and optimized Java solution.
Kth Largest in a Stream
Find the Kth largest element in a stream efficiently using a Min Heap. This approach optimizes for streaming data and top K element retrieval. O(n log k).
Buy Stock with Transaction Fee
Maximize stock-trading profit with a transaction fee using a two-state dynamic programming approach. Includes an O(n)-time, O(1)-space Java solution using hold and cash states.
Number of BSTs From Array
Calculate the number of unique Binary Search Trees (BSTs) possible for each element in an array as the root. Leverages Catalan numbers for efficient computation.
Opposite Sign Pair Reduction
Master the 'Opposite Sign Pair Reduction' problem! Learn how to efficiently reduce an array using a stack-based approach, simulating collisions. Includes Java code & complexity analysis.
Length of Longest Cycle in a Directed Graph
Learn how to find the length of the longest cycle in a directed graph where each node has at most one outgoing edge. This article explains the concept using a functional graph approach, combined with DFS and timestamp tracking to efficiently detect cycles and compute their lengths in O(V + E) time. Includes a clean Java implementation, step-by-step explanation, and edge case handling—ideal for coding interviews and advanced graph problem practice.
Remove Spaces from a String (Java)
Learn how to remove all spaces from a given string in Java while preserving the order of characters. This article explains a simple O(n) solution using StringBuilder, along with step-by-step logic and examples.
Flip to Maximize 1s in an Array
Learn how to solve the Flip to Maximize 1s problem in Java. This article explains step-by-step how to find the maximum number of 1s in a binary array after flipping at most one subarray, including code explanation, execution, and examples.
Solving the Two Water Jug Problem in Java
A complete guide to solving the Two Water Jug problem in Java. Learn how to calculate the minimum number of operations to measure a specific amount of water using two jugs, including code explanation, execution steps, and sample outputs.
Check if a Number is a Power of Another Number in Java
Determine whether a number is an exact power of another number in Java using iterative multiplication. Covers edge cases, overflow considerations, examples, and time complexity.
Toeplitz Matrix Check in Java
Learn how to check whether a given matrix is a Toeplitz matrix in Java. This article explains the diagonal-constant property, step-by-step logic, code implementation, and examples with output for better understanding.
Python vs Java: Which Programming Language Should You Choose in 2026?
Python vs Java in 2026: Which language reigns supreme? Explore their differences, use cases, learning curves, and career opportunities to make the right choice.
☕ Java: The Language That Built the Modern Digital World
Explore Java's enduring legacy! From its 'Write Once, Run Anywhere' promise to powering enterprise systems and Android apps, discover why Java still reigns supreme. ?
Why Java Continues to Dominate Modern Software Development
Discover why Java remains a dominant force in modern software development. Explore its evolution, ecosystem, enterprise reliability, and future prospects. A must-read for developers!
How to Detect and Fix Memory Leaks in Java Applications
Learn how to detect, analyze, and fix Java memory leaks using heap dumps, JVM monitoring, garbage-collection analysis, and profiling tools.
How to Fix "ClassNotFoundException" or "NoClassDefFoundError" in Java
Learn how to fix ClassNotFoundException and NoClassDefFoundError in Java with simple explanations, real examples, common causes, and practical solutions for production applications.
Evaluating the Performance Impact of JPA Lazy and Eager Loading in Java Applications
Understand the performance impact of JPA lazy and eager loading in Java applications. Learn how fetch strategies affect database queries, memory usage, and real-world application performance.
Using WebForms Core in Java (Spring Boot)
Learn how to use WebForms Core with Java and Spring Boot to load HTML templates, replace placeholders, bind events, and update the DOM through server-generated commands.
How Can We Get Last Characters Of A String In Java?
In this article, we will learn about String in Java Programming Language with examples. Explore the intricacies of Java strings, covering their creation using literals or the "new" keyword. Learn methods like charAt() to extract the last character, ensuring a comprehensive understanding through examples.
Evaluate JPA Lazy vs Eager Loading Performance in Java
Optimize JPA performance! Master lazy vs. eager loading in Java. Learn when to use each strategy, avoid N+1 queries, and improve application scalability. Boost efficiency!
Understand the Spring Bean Lifecycle in Application Design
Explore the Spring Bean lifecycle: instantiation, dependency injection, initialization, and destruction. Master bean scopes and best practices for robust applications.
Exploring Advanced Features in Java Streams for Cleaner Data Processing
Explore advanced features of Java Streams for cleaner and more efficient data processing. Learn grouping, collectors, parallel streams, custom collectors, and best practices with simple examples.
