input: Write a function to find the maximum sum of an array of non-negative integers that does not exceed a given upper limit value. 
  
  def findMaxSum(limit, array):
      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
  
  assert findMaxSum(10, [1, 3, 5, 4, 2, 6]) == 10
  assert findMaxSum(8, [1, 3, 5, 4, 2, 6]) == 7
  assert findMaxSum(5, [1, 3, 5, 4, 2, 6]) == 5
  assert findMaxSum(20, [1, 3, 5, 4, 2, 6]) == 21
  assert findMaxSum(0, [1, 3, 5, 4, 2, 6]) == 0
output: def findMaxSum(limit, array):
      maxSum = 0
      currentSum = 0
      for num in array:
          currentSum += num
          if currentSum > limit:
              currentSum = 0
          elif currentSum > maxSum:
              maxSum = currentSum
      return maxSum