Circular Array Loop
Explore how to detect cycles in circular arrays where each element directs steps forward or backward. Understand the problem constraints, and apply fast and slow pointer methods to verify if a uniform signed cycle exists, helping you sharpen your algorithmic problem-solving skills for coding interviews.
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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, movenums[i]steps forward.If
nums[i]is negative, movenums[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:
You ...