- DSA Patterns
Minimum Window Substring Problem Solution
Complete Java implementation of the sliding window technique for finding the minimum window substring containing all characters from a target string.
- DSA Patterns
Valid Anagram Solution Patterns and Implementation
Complete Java implementation guide for valid anagram problems covering sorting, counting, and hash map approaches with time/space complexity analysis.
- DSA Patterns
Best Time to Buy and Sell Stock Algorithm Solutions
Comprehensive Java solutions for the classic stock trading problem including single transaction, multiple transactions, and cooldown constraints with optimal time and space complexity analysis.
- DSA Patterns
Subarray Sum Equals K Problem Solution
Complete Java implementation for finding subarrays with sum equal to target k, covering prefix sum approach with hashmap optimization.
- DSA Patterns
Merge Sorted Arrays Algorithm Solution
Complete Java implementation of merge sorted arrays with optimal time and space complexity analysis for FAANG technical interviews.
- DSA Patterns
Rotate Array Algorithm Solutions and Implementation Patterns
Comprehensive Java solutions for rotating arrays including optimal approaches, time complexity analysis, and practical implementation strategies for FAANG technical interviews.
- DSA Patterns
Product of Array Except Self Algorithm Solution
Complete Java implementation for the product of array except self problem with optimal time and space complexity analysis.
- DSA Patterns
Maximum Subarray Problem Solution with Kadane's Algorithm
Complete Java implementation of maximum subarray problem using Kadane's algorithm with O(n) time and O(1) space complexity.
- DSA Patterns
Two Sum Algorithm Solutions and Optimization Strategies
Comprehensive Java implementation of two sum problems including brute force, hash map, and two pointer approaches with time complexity analysis.
- DSA Patterns
Greedy Algorithms and Dynamic Programming: Proof Strategies and Implementation Patterns
Comprehensive guide to proving greedy algorithms optimal and implementing dynamic programming solutions with clear problem-solving frameworks.
- DSA Patterns
Mastering Base Cases and Termination in Recursive Algorithms
Comprehensive guide to identifying and implementing correct base cases and termination conditions in recursive solutions, with practical Java examples and common pitfalls.
- DSA Patterns
Loop Invariants and Algorithm Correctness in Java
Master the art of proving loop correctness through loop invariants with practical Java implementations and systematic analysis techniques.
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.