- DSA Patterns
Find Kth Smallest Element in BST
Learn to efficiently find the kth smallest element in a binary search tree using inorder traversal and iterative approaches.
- DSA Patterns
Validate Binary Search Tree with Bounds Propagation
Complete Java solution for validating BST using bounds propagation technique with detailed time/space analysis and edge case handling.
- DSA Patterns
Word Search and Dictionary Matching Algorithms
Comprehensive guide to implementing word search and dictionary matching algorithms using tries, backtracking, and optimized search techniques for FAANG coding interviews.
- DSA Patterns
Designing an Autocomplete System with Trie Data Structure
Implementation of autocomplete functionality using trie data structure with efficient prefix matching and suggestion ranking.
- DSA Patterns
Prefix Search Algorithms and Implementation Strategies
Comprehensive guide to prefix search techniques including Trie data structures, binary search approaches, and practical implementation patterns for efficient string matching.
- DSA Patterns
Top K Frequent Elements - Java Algorithm Solution
Complete Java implementation for finding the k most frequent elements in an array, covering multiple approaches from heap-based to bucket sort solutions.
- DSA Patterns
Kth Largest Element in an Array - Algorithm Patterns and Implementation
Learn to find kth largest/smallest elements efficiently using heap-based approaches, quickselect algorithm, and sorting techniques with complete Java implementations.
- DSA Patterns
Median from Data Stream - Streaming Statistics Problem
Learn to efficiently find median values from a continuous data stream using two heaps for optimal time and space complexity.
- DSA Patterns
Merge K Sorted Lists Algorithm Solution
Complete Java implementation of merging k sorted linked lists using priority queue and divide-and-conquer approaches with time and space complexity analysis.
- DSA Patterns
Subtree of Another Tree Algorithm Solution
Complete Java implementation for checking if one binary tree is a subtree of another, including multiple approaches and time complexity analysis.
- DSA Patterns
Invert Binary Tree Algorithm Solution
Complete Java implementation of binary tree inversion with recursive and iterative approaches, including time complexity analysis and practical considerations for FAANG interviews.
- DSA Patterns
Tree Path Sum Problems in Java: DFS and BFS Solutions
Comprehensive guide to solving tree path sum problems using DFS and BFS traversal techniques 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.