Curated by Naveen Kumar

Goal: Master the core logic before jumping into complex algorithms. Focus on quality over quantity.

🏁 Level 1: The Basics (Language Proficiency)

Before starting DSA, make sure you're comfortable with:

• Time & Space Complexity (Big O) — Understanding efficiency.
• Arrays & Strings — Basic manipulation and built-in methods.
• Recursion — The foundation for Trees and DP.

🛠️ Level 2: The "Must-Know" Patterns

This is the heart of the sheet. Group your LeetCode links here:

1. Two Pointers & Sliding Window

Perfect for Array and String problems.

• [ ] 217. Contains Duplicate (Easy)
• [ ] 121. Best Time to Buy and Sell Stock (Easy)
• [ ] 167. Two Sum II (Medium - classic pattern)

2. Prefix Sum

Great for range-based queries.

• [ ] 724. Find Pivot Index (Easy)
• [ ] 303. Range Sum Query (Easy)