input: def findMaxSum(limit: int, array: List[int]) -> int:
      """ Find the maximum sum of a subarray of non-negative integers that does not exceed a given upper limit.
      >>> findMaxSum(10, [1, 3, 5, 4, 2, 6])
      10
      >>> findMaxSum(8, [2, 3, 5, 1, 2])
      8
      """
      maxSum = 0
      for i in range(len(array)):
          currentSum = 0
          for j in range(i, len(array)):
              currentSum += array[j]
              if currentSum <= limit and currentSum > maxSum:
                  maxSum = currentSum
      return maxSum
output:     maxSum = 0
      currentSum = 0
      for num in array:
          if currentSum + num > limit:
              currentSum = num if num <= limit else 0
          else:
              currentSum += num
          if currentSum > maxSum:
              maxSum = currentSum
      return maxSum