GFG POTD 26 April 2026 | Common in 3 Sorted Arrays | 3 Pointer Approach | Python | Interview Problem

🔥 GeeksforGeeks Problem of the Day – 26 April 2026

Today’s Problem:
Common in 3 Sorted Arrays

In this video, we solve this important array interview problem using the optimal Three Pointer Approach.

💡 Concepts Covered:
✔ Sorted Array Optimization
✔ Three Pointer Technique
✔ Duplicate Removal Logic
✔ Interview Explanation
✔ Python Clean Code Solution

🧠 Main Idea:

Since all three arrays are already sorted, we can avoid brute force.

We use:
i → pointer for first array
j → pointer for second array
k → pointer for third array

If all three values are equal:
→ common element found

Otherwise:
→ move the pointer having the smallest value

This reduces the time complexity drastically and avoids TLE.

⏱ Time Complexity:
O(n1 + n2 + n3)

💾 Space Complexity:
O(1) (excluding output)

This is a very common interview pattern for sorted arrays and helps build strong pointer-based problem solving skills.

If this helped you, make sure to:
👍 Like
💬 Comment
🔔 Subscribe
📌 Share with your coding friends

#gfgpotd #geeksforgeeks #arrays #threepointers #python #dsa #codinginterview #placementpreparation #problemoftheday #competitiveprogramming #gfgdailychallenge

Видео GFG POTD 26 April 2026 | Common in 3 Sorted Arrays | 3 Pointer Approach | Python | Interview Problem канала Anand Solves