Mar 3 • ⚒️ Interview Questions 🛠️
Two Pointers: The Underrated Trick for Faster Solutions
Why check every pair in O(n²) when you can solve it in O(n)?
The two-pointer technique is pure magic!
The two-pointer technique is one of the simplest ways to optimize problems involving arrays or linked lists. Instead of using nested loops, we use two indices that move towards each other or in the same direction.
📌 Examples where it shines:
✅ Finding pairs that sum to a target (Two Sum for sorted arrays)
✅ Checking if a string is a palindrome
✅ Merging two sorted lists
It’s super useful, but it only works when the problem has a sorted structure or a clear left-to-right movement.
What’s your favorite problem that uses two pointers? Have you ever found a creative use for it?
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Two Pointers: The Underrated Trick for Faster Solutions
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