Welcome to Javarena – a comprehensive, Java-based repository crafted to help you master coding interviews with carefully curated DSA problems organized by topics and companies.
This repository includes:
- ✅ Data Structures & Algorithms (DSA) – Comprehensive topic-wise and company-wise curated problems from **LeetCode **, GeeksforGeeks, and more
- 🏢 Company-Wise Tracking – Solved and categorized interview problems for top tech companies like Amazon, Adobe, Google, Microsoft, and many others
- 📊 Progress Tracking – Built-in topic suggester to help you practice consistently
src/main/java/com/javarena/dsa/
├── algorithms/ # Algorithm implementations & problems
│ ├── binarySearch/ # Binary search problems
│ ├── bitManupulation/ # Bit manipulation problems
│ ├── dynamicProgramming/ # DP problems
│ ├── greedy/ # Greedy algorithm problems
│ ├── recursionAndBacktracking/ # Recursion & backtracking
│ ├── string/ # String algorithms (KMP, etc.)
│ ├── twoPointerAndSlidingWindow/ # Two pointer problems
│ └── miscellaneous/ # Other algorithm problems
│
├── datastructures/ # Data structure implementations
│ ├── arrays/ # Array problems
│ ├── binaryTree/ # Binary tree problems
│ ├── graph/ # Graph algorithms
│ ├── linkedList/ # Linked list problems
│ ├── stackAndQueue/ # Stack & queue problems
│ ├── string/ # String data structure problems
│ ├── trie/ # Trie implementations
│ ├── segmentTree/ # Segment tree
│ ├── fenwickTree/ # Fenwick tree (BIT)
│ └── hashMapAndSet/ # HashMap & HashSet problems
│
├── companies/ # Company-wise problem tracking (386 companies)
│ ├── Amazon.md
│ ├── Google.md
│ ├── Microsoft.md
│ └── ... (and many more)
│
└── utils/ # Utility classes
├── Main.java # Main entry point
└── TopicSuggester.java # Daily topic suggestion tool
| # | Topic |
|---|---|
| 1 | Binary Search |
| 2 | Bit Manipulation |
| 3 | Dynamic Programming |
| 4 | Greedy Algorithms |
| 5 | Recursion & Backtracking |
| 6 | String Algorithms |
| 7 | Two Pointer |
| 8 | Sliding Window |
| # | Topic |
|---|---|
| 1 | Arrays |
| 2 | Linked List |
| 3 | Stack & Queue |
| 4 | Binary Tree |
| 5 | Graph |
| 6 | Trie |
| 7 | Segment Tree |
| 8 | Fenwick Tree |
Solve company-tagged questions like real interviews and track your progress here:
| Company | File |
|---|---|
| Amazon | Amazon.md |
| Adobe | Adobe.md |
| Google.md | |
| Microsoft | Microsoft.md |
| Meta | Meta.md |
| Apple | Apple.md |
| +380 More... | 📁 View all companies |
Each file contains:
- 🎯 Problem link
- 📂 Solution file path
- ⚡️ Difficulty & topic tags
git clone https://github.com/piyush7199/javarena-dsa.git
cd javarena-dsamvn clean compilemvn exec:java -Dexec.mainClass="com.javarena.dsa.utils.TopicSuggester"Open in your favorite IDE:
- IntelliJ IDEA: File → Open → Select project directory
- VS Code: Install Java Extension Pack, then open project directory
- Eclipse: File → Import → Maven → Existing Maven Projects
