You are given an array of integers nums and an integer k.
Return the maximum sum of a subarray of nums, such that the size of the subarray is divisible by k.
\n
Example 1:
\n\nInput: nums = [1,2], k = 1
\n\nOutput: 3
\n\nExplanation:
\n\nThe subarray [1, 2] with sum 3 has length equal to 2 which is divisible by 1.
Example 2:
\n\nInput: nums = [-1,-2,-3,-4,-5], k = 4
\n\nOutput: -10
\n\nExplanation:
\n\nThe maximum sum subarray is [-1, -2, -3, -4] which has length equal to 4 which is divisible by 4.
Example 3:
\n\nInput: nums = [-5,1,2,-3,4], k = 2
\n\nOutput: 4
\n\nExplanation:
\n\nThe maximum sum subarray is [1, 2, -3, 4] which has length equal to 4 which is divisible by 2.
\n
Constraints:
\n\n1 <= k <= nums.length <= 2 * 105-109 <= nums[i] <= 109index%k."
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