🧠 DSA Journey

Welcome to my Data Structures & Algorithms (DSA) preparation journey!

This repository documents my structured practice of 180+ handpicked DSA questions, organized by topic and difficulty level. The questions are based on Striver's SDE Sheet, one of the most widely respected roadmaps for software engineering interview preparation.

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🎯 Goal

To master fundamental and advanced DSA concepts through consistent, focused practice — and to improve both my problem-solving depth and coding fluency.
I’m tracking my learning across five revision levels to ensure spaced repetition and retention.

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📚 Topics Covered

1. Time Complexity
2. Searching
3. Sorting
4. Arrays
5. Strings
6. Linked Lists
7. Hashmaps & Sets
8. Stacks & Queues
9. Two Pointers
10. Greedy
11. Heaps
12. Bitwise Manipulation
13. Recursion & Backtracking
14. Trees
15. Dynamic Programming
16. Graphs
17. Union-Find
18. Tries All problems are organized into folders under these topic names.

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📈 Revision Strategy

Each topic is revised through five progressive levels:

Revision	Level Description	Problem Count
Rev 1	Very Easy Questions	10–15
Rev 2	Easy Questions	8–10
Rev 3	Medium Level (Round 1)	10–12
Rev 4	Medium Level (Round 2)	10–12
Rev 5	Company-Specific/Advanced Focus	varies

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🧩 How I Solve Each Problem

I'm following the 6-step problem-solving strategy by Anthony D. Mays (former Google Engineer):

1. 🗣️ Repeat the problem aloud to ensure understanding and buy time.
2. ❓ Ask clarifying questions to validate assumptions.
3. 🔍 Work through examples to understand edge cases and behavior.
4. 💡 Brainstorm multiple solutions, aiming for the most optimal.
5. 💻 Implement correct code in C++/Python — no pseudocode.
6. 🐞 Test thoroughly with edge cases and step-by-step walkthroughs.

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🗂️ Folder Structure

Dsa-journey/

• arrays/
• strings/
• linked-lists/
• hashmaps-and-sets/
• stacks-and-queues/
• two-pointers/
• greedy/
• heaps/
• bitwise/
• recursion-and-backtracking/
• trees/
• dp/
• graphs/
• union-find/
• tries/
  Each folder contains solutions in .cpp format with:

• Problem name
• Problem link
• Approach explanation
• Clean, commented code

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📌 Why This Repo?

• To stay accountable and track my progress visually
• To solidify concepts through repetition and structure
• To document high-quality solutions for revision and sharing

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💻 Platforms Used

• LeetCode
• CodeNinjas

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💬 "Coding interviews aren't just about code — they're about communication, clarity, and consistency." — Inspired by Anthony D. Mays