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Leetcode Problem 918. Maximum Sum Circular Subarray

918. Maximum Sum Circular Subarray

Leetcode Solutions

Calculate the 'Minimum Subarray'

  1. Use Kadane's algorithm to find the maximum subarray sum (maxSum).
  2. Use a modified version of Kadane's algorithm to find the minimum subarray sum (minSum), by using min() instead of max().
  3. Calculate the total sum of the array (totalSum).
  4. If minSum is equal to totalSum, return maxSum as the result.
  5. Otherwise, calculate the 'special sum' as totalSum - minSum.
  6. Return the maximum of maxSum and the 'special sum'.
UML Thumbnail

Enumerate prefix and suffix sums

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