Maximum Sum Circular Subarray
Given a circular integer array nums of length n, return the maximum possible sum of a non-empty subarray of nums.
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].
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.
Example 1
Input
nums = [1,-2,3,-2]Output
3Subarray [3] has maximum sum 3.
Example 2
Input
nums = [5,-3,5]Output
10Subarray [5, 5] has maximum sum 5 + 5 = 10.
Constraints
- n == nums.length
- 1 <= n <= 3 * 10^4
- -3 * 10^4 <= nums[i] <= 3 * 10^4