- DSA Patterns
Combination Sum Algorithm Solutions and Implementation Guide
Comprehensive Java solutions for combination sum problems including backtracking and dynamic programming approaches with time complexity analysis.
- DSA Patterns
Subsets and Permutations Problem Solving Patterns in Java
Comprehensive guide to subset and permutation generation algorithms with iterative and recursive approaches, including time complexity analysis and practical implementation strategies.
- DSA Patterns
Finding Medians and Percentiles in Data Streams
Comprehensive guide to solving median and percentile problems using heaps, binary search, and sliding window techniques in Java.
- DSA Patterns
Kth Largest Element in an Array - QuickSelect Algorithm
Learn to find the kth largest element in an array using the QuickSelect algorithm with O(n) average time complexity.
- DSA Patterns
Lower and Upper Bound in Sorted Arrays
Complete Java solution for finding lower and upper bounds in sorted arrays using binary search with detailed complexity analysis and implementation trade-offs.
- DSA Patterns
Search in Rotated Sorted Array Java Solution
Complete Java implementation of rotated sorted array search with binary search optimization and edge case handling for FAANG interviews.
- DSA Patterns
Binary Search on Answer - Mastering the Search Space Optimization Pattern
Learn how to apply binary search on answer space to solve optimization problems efficiently with Java implementations.
- DSA Patterns
Binary Search Algorithm Implementation and Applications
Complete Java solution for binary search with multiple use cases, time complexity analysis, and practical implementation patterns for FAANG interviews.
- DSA Patterns
Counting Sort, Bucket Sort, and Radix Sort Use Cases and Implementation
Comprehensive guide to when and how to apply counting sort, bucket sort, and radix sort algorithms with practical Java implementations.
- DSA Patterns
Sorting and Merging Intervals in Java
Complete Java solution for interval sorting problems including merge intervals, interval scheduling, and overlap detection with optimal time complexity.
- DSA Patterns
Merge Sort vs Quick Sort: Core Algorithm Comparison
Comprehensive Java implementation and analysis of merge sort and quick sort algorithms with time complexity, space considerations, and practical trade-offs for FAANG interviews.
- DSA Patterns
Cycle Detection in Undirected Graphs Using Union-Find
Complete Java solution for detecting cycles in undirected graphs using Union-Find disjoint set data structure with O(E α(V)) time complexity.
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.