- DSA Patterns
Lowest Common Ancestor in Binary Trees and Graphs
Comprehensive Java solution for finding the lowest common ancestor in binary trees, including iterative and recursive approaches with time complexity analysis.
- DSA Patterns
Binary Tree Diameter and Height Analysis
Complete Java solution for calculating binary tree diameter, height, and balance with optimal time complexity and practical implementation considerations.
- DSA Patterns
Level Order Traversal of Binary Trees
Complete Java solution for level order traversal with BFS approach, including edge case handling and time complexity analysis.
- DSA Patterns
Tree Traversals: Preorder, Inorder, and Postorder Depth-First Search
Complete Java implementation of tree traversal algorithms with iterative and recursive approaches, including time/space complexity analysis and practical use cases.
- DSA Patterns
Sliding Window Maximum Problem Solution
Complete Java implementation of the sliding window maximum problem using deque data structure with O(n) time and space complexity analysis.
- DSA Patterns
Monotonic Deque Implementation and Applications
Complete Java solution for monotonic queue using deque with detailed complexity analysis and practical applications.
- DSA Patterns
Breadth-First Search Queue Patterns in Java
Comprehensive guide to BFS queue patterns including level-order traversal, shortest path finding, and multi-source exploration with practical Java implementations.
- DSA Patterns
Expression Evaluation Algorithms and Techniques
Comprehensive guide to evaluating mathematical expressions using stack-based approaches, infix to postfix conversion, and operator precedence handling.
- DSA Patterns
Monotonic Stack Patterns in Java: Efficient Algorithm Design
Comprehensive guide to monotonic stack patterns with practical Java implementations for FAANG interviews and algorithmic problem solving.
- DSA Patterns
Design and Implement a Min Stack Data Structure
Complete Java solution for min stack problem with O(1) time complexity for all operations including getMin().
- DSA Patterns
Valid Parentheses Problem Solution
Complete Java implementation for validating balanced parentheses using stack data structure with time and space complexity analysis.
- DSA Patterns
Reorder Linked List - Rotate and Rearrange Algorithm
Complete Java solution for rotating and reordering linked lists with optimal time and space complexity analysis.
Data Structures & Algorithms Patterns Guide
A curated guide for pattern recognition, core data structures, and implementation speed. Use it to plan practice, track coverage, and rehearse solutions with a repeatable approach.