Search⌘ K
AI Features
Home
Courses
Grokking the Coding Interview Patterns in Go

Circular Array Loop

Explore how to detect circular loops in integer arrays using the fast and slow pointer approach. Understand the problem constraints and learn to determine if a cycle exists where all elements have the same sign. This lesson helps build skills in solving cycle-related problems in coding interviews effectively.

We'll cover the following...

Statement

There is a circular list of non-zero integers called nums. Each number in the list tells you how many steps to move forward or backward from your current position:

  • If nums[i] is positive, move nums[i] steps forward.

  • If nums[i] is negative, move nums[i] steps backward.

As the list is circular:

  • Moving forward from the last element takes you back to the first element.

  • Moving backward from the first element takes you to the last element.

A cycle in this list means:

...