{ "data": { "question": { "questionId": "954", "questionFrontendId": "918", "boundTopicId": null, "title": "Maximum Sum Circular Subarray", "titleSlug": "maximum-sum-circular-subarray", "content": "

Given a circular integer array nums of length n, return the maximum possible sum of a non-empty subarray of nums.

\n\n

A circular array means the end of the array connects to the beginning of the array. Formally, the next element of nums[i] is nums[(i + 1) % n] and the previous element of nums[i] is nums[(i - 1 + n) % n].

\n\n

A subarray may only include each element of the fixed buffer nums at most once. Formally, for a subarray nums[i], nums[i + 1], ..., nums[j], there does not exist i <= k1, k2 <= j with k1 % n == k2 % n.

\n\n

 

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Example 1:

\n\n
\nInput: nums = [1,-2,3,-2]\nOutput: 3\nExplanation: Subarray [3] has maximum sum 3.\n
\n\n

Example 2:

\n\n
\nInput: nums = [5,-3,5]\nOutput: 10\nExplanation: Subarray [5,5] has maximum sum 5 + 5 = 10.\n
\n\n

Example 3:

\n\n
\nInput: nums = [-3,-2,-3]\nOutput: -2\nExplanation: Subarray [-2] has maximum sum -2.\n
\n\n

 

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Constraints:

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