{"id":32814566,"url":"https://github.com/onyxwizard/coding-challenges","last_synced_at":"2026-07-03T09:31:35.927Z","repository":{"id":321038367,"uuid":"1084195133","full_name":"onyxwizard/coding-challenges","owner":"onyxwizard","description":"A collection of fundamental recursion problems solved in Java, demonstrating core concepts like base cases, recursive decomposition, and problem-solving strategies for beginners. 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Every file here represents a moment of focus, a bug I wrestled with, or a concept that finally clicked.\n\nI started this not to impress anyone, but to **build consistency**. In a world full of tutorials and shortcuts, I wanted a space where I could *do the work*, day after day, without distraction.\n\n\n## 🗂️ How It’s Organized\n\nI’ve grouped problems by the **platform or curriculum** that inspired them:\n\n- **`takeuforward/`**  \n  Following [Striver’s SDE Sheet](https://takeuforward.org/interviews/strivers-sde-sheet-top-coding-interview-problems/) — a goldmine for DSA interview prep. Organized by topic: arrays, linked lists, trees, graphs, DP, etc.\n\n- **`leetcode/`**  \n  Classic LeetCode problems, named with their number and title (e.g., `0001-two-sum/`). I solve these to sharpen my logic and prepare for real interview scenarios.\n\n- **`neetcode/`**  \n  Based on the [NeetCode 150](https://neetcode.io/) list — a curated set of the most important problems. Grouped by NeetCode’s own categories like “Arrays \u0026 Hashing” or “Backtracking”.\n\n- **`hackerrank/`**  \n  Mostly from HackerRank’s *Algorithms* and *Data Structures* tracks. Great for foundational practice and timed challenges.\n\nInside each, you’ll find:\n```\nplatform/\n└── topic/\n    └── problem-name/\n        └── Solution.java\n```\n\nEvery `Solution.java` is **self-contained**, includes comments explaining my approach, and often has a `main()` method with sample test cases so I can run it instantly.\n\n\n\n## ☕ Why Java?\n\nI chose Java because:\n- It’s what I use daily (or aim to).\n- Its strong typing helps me think clearly about data.\n- It’s widely used in enterprise and interviews.\n- Writing clean, object-oriented Java forces discipline.\n\nNo Python shortcuts here—just deliberate practice in the language I want to master.\n\n\n\n## 📈 What This Repo Tracks (For Me)\n\nThis isn’t about solving 1000 problems. It’s about **deep understanding**. For each problem, I ask:\n- What’s the brute force?  \n- Can I optimize time or space?  \n- Have I seen this pattern before?  \n- How would I explain this in an interview?\n\nOver time, I hope to see:\n- Fewer “I’ve seen this before!” moments → more “I can derive this!” moments  \n- Cleaner code with less boilerplate  \n- Faster recognition of problem types (sliding window, DFS vs BFS, DP states, etc.)\n\n\n## 🛠️ How I Use It\n\n1. **Daily Practice**: Pick 1–2 problems based on my current focus area.  \n2. **Review Weekly**: Revisit old solutions—can I improve them?  \n3. **Run Locally**:  \n   ```bash\n   cd leetcode/0020-valid-parentheses/\n   javac Solution.java \u0026\u0026 java Solution\n   ```\n4. **Commit with Context**:  \n   My commit messages often include notes like:  \n   _“Solved using stack — remembered the pattern from NeetCode!”_\n\n\n\n## 🌱 This Is a Work in Progress\n\nSome solutions are elegant. Others are… functional.  \nSome folders are full. Others are empty—waiting for me to show up tomorrow.\n\u003eAnd that’s okay.  \nThis repo isn’t perfect.  \n**It’s alive.**\n\nAs long as I’m learning, it’s serving its purpose.\n\n\n\n\n*Last updated: October 27, 2025*  \n*Next goal: Patterns `takeuforward/`*  \n\n\n\u003e 💬 **To future me**:  \n\u003e *Don’t skip the hard ones. Don’t compare your Day 30 to someone else’s Day 300. Just keep writing `Solution.java`.*\n","project_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fonyxwizard%2Fcoding-challenges","html_url":"https://awesome.ecosyste.ms/projects/github.com%2Fonyxwizard%2Fcoding-challenges","lists_url":"https://awesome.ecosyste.ms/api/v1/projects/github.com%2Fonyxwizard%2Fcoding-challenges/lists"}