Sliding Window Pattern

The Sliding Window pattern is one of the reusable techniques that experienced candidates spot instantly. Rather than memorising individual problems, strong interviewees recognise that a new question "is just Sliding Window" and reach for the matching template. That recognition is exactly what this collection is designed to build.

We index 14 problems that use the Sliding Window pattern (4 easy, 8 medium, 2 hard), each worked brute-force → optimal in Java and Python with line-by-line explanations. Solving them back-to-back is the fastest way to internalise when and how to apply Sliding Window.

Pattern-first practice compounds: once Sliding Window is automatic, you'll see it inside problems that never mention it by name.