oday I focused on mastering the Two Pointer Pattern, a powerful technique to optimize brute-force solutions from O(n²) → O(n).
📌 What I learned
When & where to use two pointers
Works best with arrays, strings & linear data structures
Helps write clean, efficient interview-ready code
🧠 Problems Solved
✅ 125. Valid Palindrome
✅ 344. Reverse String
✅ 977. Squares of a Sorted Array
✅ 680. Valid Palindrome II
⏱️ Most solutions achieved O(n) time & O(1) space
Key takeaway: Pattern recognition > memorizing solutions.
On to Day 3 💪
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