Maximum Sum Subarray in Circular

To find the maximum sum of a non-empty subarray in a circular array, you can use Kadane’s algorithm to calculate the maximum subarray sum for non-circular arrays. The circular subarray sum can be derived by subtracting the minimum subarray sum from the total array sum. This approach efficiently handles both circular and non-circular cases in linear time. The maximum sum is the larger of the normal subarray sum and the circular sum. Special cases where all elements are negative are handled by returning the normal maximum subarray sum.

For more details, check out the full article: Maximum Circular Subarray Sum.