Leetcode Problem 457. Circular Array Loop
Leetcode Solutions
Fast and Slow Pointer Detection of Cycle
- Iterate through each element in the array.
- If the current element is zero, continue to the next element.
- Initialize slow and fast pointers to the current index.
- While the product of the current element and the element at the fast pointer is positive: a. Move the slow pointer one step forward. b. Move the fast pointer two steps forward. c. If the slow pointer equals the fast pointer, check for a self-loop. If it's not a self-loop, return true.
- If a cycle is not found, mark all elements visited in this iteration as zero.
- If no cycle is found after iterating through all elements, return false.
Visited Set to Detect Cycles
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