Mastering Two Pointers for Coding Interviews

You can solve five of the most common coding interview problems with one simple pattern.

It's called the Two Pointers technique. Instead of complicated loops, just place one pointer

at the start of an array and one at the end. Then, you move them towards

each other based on a simple condition. This single trick works for checking if a string is a

palindrome, finding pairs that sum to a target in a sorted list, or even finding

the container with the most water. It’s incredibly fast and uses almost no extra memory.

It turns a slow, brute-force approach into an elegant, optimal solution.