Check Subarray Sum

[
  [
    1,
    2,
    3,
    5,
    2,
    3,
    1
  ],
  8
]

Explanation. There are two subarrays with length 3 each (`[1, 2, 3]`, one starting at index 0 and one starting at index 4), both having a sum of 6, and `6` is not equal to `k=8`. Thus, even though there are same sum subarrays, neither matches `k` exactly.

[
  [
    4,
    2,
    1,
    3,
    9,
    2,
    11,
    5,
    6
  ],
  16
]

Explanation. There are two subarrays with length 3 each (`[9, 2, 11]`, one starting at index 4 and `[5, 6, 2]`, one starting after some gaps at index 7), both having a sum of 16, which is exactly `k`. Thus returns `true`.

[
  [
    5,
    5,
    5,
    5
  ],
  5
]

Explanation. Although there are subarrays with sum equal to 5, there are no two non-overlapping subarrays that can be formed under the constraints of having the same length. Thus, the answer is `false`.

[
  [
    1,
    2,
    1,
    2,
    1,
    3
  ],
  3
]

Explanation. Non-overlapping subarrays `[1, 2]` and `[2, 1]` exist and sum to `k=3`. Thus, the answer is `true`.

[
  [
    1,
    2
  ],
  5
]

Explanation. The length of array is 2 which doesn’t allow forming two non-overlapping subarrays of the same length with the k value. Thus returns `false`.