Leetcode 918. Maximum Sum Circular Subarray

Given a circular integer array, return the maximum sum of any non-empty contiguous subarray (allowed to wrap from end to start). Typical solution uses Kadane’s algorithm for the non-wrapping case and total-sum minus minimum-subarray for the wrapping case, with care for the all-negative edge case.

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Leetcode 918. Maximum Sum Circular Subarray

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