— A living log of problems solved, patterns learned, and progress made

This repository isn’t just a folder of code—it’s my digital notebook for mastering data structures, algorithms, and problem-solving in Java. Every file here represents a moment of focus, a bug I wrestled with, or a concept that finally clicked.

I 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.

I’ve grouped problems by the platform or curriculum that inspired them:

• takeuforward/
  Following Striver’s SDE Sheet — a goldmine for DSA interview prep. Organized by topic: arrays, linked lists, trees, graphs, DP, etc.

• leetcode/
  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.

• neetcode/
  Based on the NeetCode 150 list — a curated set of the most important problems. Grouped by NeetCode’s own categories like “Arrays & Hashing” or “Backtracking”.

• hackerrank/
  Mostly from HackerRank’s Algorithms and Data Structures tracks. Great for foundational practice and timed challenges.

Inside each, you’ll find:

platform/
└── topic/
    └── problem-name/
        └── Solution.java

Every 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.

I chose Java because:

• It’s what I use daily (or aim to).
• Its strong typing helps me think clearly about data.
• It’s widely used in enterprise and interviews.
• Writing clean, object-oriented Java forces discipline.

No Python shortcuts here—just deliberate practice in the language I want to master.

This isn’t about solving 1000 problems. It’s about deep understanding. For each problem, I ask:

• What’s the brute force?
• Can I optimize time or space?
• Have I seen this pattern before?
• How would I explain this in an interview?

Over time, I hope to see:

• Fewer “I’ve seen this before!” moments → more “I can derive this!” moments
• Cleaner code with less boilerplate
• Faster recognition of problem types (sliding window, DFS vs BFS, DP states, etc.)

1. Daily Practice: Pick 1–2 problems based on my current focus area.
2. Review Weekly: Revisit old solutions—can I improve them?
3. Run Locally:

   cd leetcode/0020-valid-parentheses/
   javac Solution.java && java Solution

4. Commit with Context:
   My commit messages often include notes like:
   “Solved using stack — remembered the pattern from NeetCode!”

Some solutions are elegant. Others are… functional.
Some folders are full. Others are empty—waiting for me to show up tomorrow.

And that’s okay.
This repo isn’t perfect.
It’s alive.

As long as I’m learning, it’s serving its purpose.

Last updated: October 27, 2025
Next goal: Patterns takeuforward/

💬 To future me:
Don’t skip the hard ones. Don’t compare your Day 30 to someone else’s Day 300. Just keep writing Solution.java.