🄵🄰🄸🄻 Leetcode 2657. Find the Prefix Common Array of Two Arrays

💡 Hey there, coding enthusiasts!
Join me as I take on a LeetCode Medium challenge to track permutations using:
🔹 HashSets for simplicity
🔹 Bitmasks for efficiency

🛠️ What you’ll see in this video:
✅ Breaking down the problem step-by-step
✅ Exploring two cool approaches to solve it
❌ A small mistake (oops 😅), but hey, learning is part of the journey!

💻 Summary of Code
The code in video implements a solution to find the prefix common array for two input arrays, A and B, using HashSets.

Key Steps:
✨Use two HashSets, setA and setB, to track elements of A and B encountered so far.
✨Traverse both arrays and update a result array, res, where each index represents the count of common elements in the prefixes of A and B up to that point.
✨Increment counts in res when:
✨✨A[i] exists in setB.
✨✨B[i] exists in setA (but is not equal to A[i] to avoid double-counting).

🔥 Let’s grow our coding skills together!
✨ Don’t forget to like 👍, comment 💬, and subscribe 🔔 for more coding challenges and solutions. Let’s grow and succeed as coders! 🚀

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