Two Pointer Method

Two Pointer Method

Various ways of using two pointer

This method is quite helpful in array's to do in-place operations and help us to save an extra space of O(n).

This technique can also be used to solve:

• Slow-pointer and fast-pointer problem in Linked List

• Sliding Window Problem

Iterate the array from two ends to the middle. One slow-runner and one fast-runner at the same time.