You are given an integer array nums and two integers l and r. Your task is to find the minimum sum of a subarray whose size is between l and r (inclusive) and whose sum is greater than 0.
Return the minimum sum of such a subarray. If no such subarray exists, return -1.
\n\nA subarray is a contiguous non-empty sequence of elements within an array.
\n\n\n
Example 1:
\n\nInput: nums = [3, -2, 1, 4], l = 2, r = 3
\n\nOutput: 1
\n\nExplanation:
\n\nThe subarrays of length between l = 2 and r = 3 where the sum is greater than 0 are:
[3, -2] with a sum of 1[1, 4] with a sum of 5[3, -2, 1] with a sum of 2[-2, 1, 4] with a sum of 3Out of these, the subarray [3, -2] has a sum of 1, which is the smallest positive sum. Hence, the answer is 1.
Example 2:
\n\nInput: nums = [-2, 2, -3, 1], l = 2, r = 3
\n\nOutput: -1
\n\nExplanation:
\n\nThere is no subarray of length between l and r that has a sum greater than 0. So, the answer is -1.
Example 3:
\n\nInput: nums = [1, 2, 3, 4], l = 2, r = 4
\n\nOutput: 3
\n\nExplanation:
\n\nThe subarray [1, 2] has a length of 2 and the minimum sum greater than 0. So, the answer is 3.
\n
Constraints:
\n\n1 <= nums.length <= 1001 <= l <= r <= nums.length-1000 <= nums[i] <= 1000Compiled with clang 19 using the latest C++ 23 standard, and libstdc++ provided by GCC 14.
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