code: def two_sum1(numbers, target):
      """
      Given a list of numbers, find the indices of two numbers such that their
      sum is the given target.
  
      Using a hash table.
      """
      dic = {}
      for i, num in enumerate(numbers):
          if target - num in dic:
              return [dic[target - num] + 1, i + 1]
          dic[num] = i
      return None
  
label_desc: Use image node_id 2 for calling a global function with example usage: two_sum1(numbers, target) and returns: None, list