Two Pointers & Sliding Windows

Question 1

How does the two-pointer technique work?

Answer 1

Uses two indices to optimize searching.

Question 2

Two-Pointer Use Cases:

Answer 2

Sorted Two Sum, Reverse String.

Question 3

Sliding Window

Answer 3

Shrinks and expands a window for optimization.

Question 4

Fixed vs. Variable Window:

Answer 4

Fixed has a set size; variable expands/contracts.