code: def delta_decode(in_array):
      
      if len(in_array) == 0:
          return []
      this_ans = in_array[0]
      out_array = [this_ans]
      for i in range(1, len(in_array)):
          this_ans += in_array[i]
          out_array.append(this_ans)
      return out_array
docs: A function to delta decode an int array.
  
      :param in_array: the input array of integers
      :return the decoded array