- DSA Patterns
3Sum Problem Solution - Efficient Algorithm for Finding Triplets
Complete Java solution for the classic 3Sum algorithm with two-pointer technique, including time complexity analysis and edge case handling.
- DSA Patterns
Fast Slow Pointer Algorithm Patterns in Java
Comprehensive guide to fast/slow pointer techniques for linked list cycle detection, middle element finding, and related algorithmic problems with Java implementations.
- DSA Patterns
Trapping Rain Water Algorithm Solution
Complete Java implementation of the trapping rain water problem with multiple approaches including two-pointer and dynamic programming techniques.
- DSA Patterns
Container With Most Water Algorithm Solution
Complete Java implementation of the container with most water problem using two-pointer technique with O(n) time and space complexity analysis.
- DSA Patterns
Pair Sum in Sorted Arrays Algorithm
Complete Java solution for finding pairs that sum to a target value in sorted arrays using two-pointer technique with O(n) time complexity.
- DSA Patterns
Constant-time lookup patterns in Java
Master constant-time lookup techniques using hash tables, binary search, and indexing strategies for optimal performance in production systems.
- DSA Patterns
Prefix Sum with Hash Maps for Subarray Problems
Master prefix sum techniques with hash maps to efficiently solve subarray sum problems including contiguous subarrays and range queries.
- DSA Patterns
Set-Based Deduplication Algorithms and Implementation Patterns
Comprehensive guide to deduplication techniques using hash sets and other set-based data structures with practical Java implementations.
- DSA Patterns
Frequency Counting with Hash Maps in Java
Comprehensive guide to implementing frequency counting using hash maps, including time complexity analysis and practical applications in FAANG interviews.
- DSA Patterns
Longest Substring Without Repeating Characters
Comprehensive Java solution for finding the longest substring without repeating characters using sliding window technique with detailed complexity analysis and edge case handling.
- DSA Patterns
Reverse String and Palindrome Check Algorithms
Comprehensive Java solutions for string reversal and palindrome validation with multiple approaches and performance analysis.
- DSA Patterns
Group Anagrams Problem Solution | LeetCode 49
Complete Java solution for grouping anagrams with optimal time and space complexity analysis for FAANG interviews.
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.