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Grokking the Coding Interview Patterns in C#

Circular Array Loop

Explore how to detect cycles in circular arrays by applying the fast and slow pointers method. Understand how to analyze sequences and solve related coding interview problems involving forward and backward movements, enhancing your problem-solving skills.

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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:

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