input: Write a function to create a dictionary from a list of strings where each string follows the format "key->value". The function should split each string on "->" and store the result in a dictionary. If the input list is empty, return an empty dictionary.
  
  def build_dictionary(samples):
   dictionary = {}
   for sample in samples:
    key, value = sample.split("->")
    dictionary[key] = value
   return dictionary
  
  assert build_dictionary(["apple->red", "banana->yellow", "cherry->red"])=={'apple': 'red', 'banana': 'yellow', 'cherry': 'red'}
  assert build_dictionary([])=={}
output: def build_dictionary(samples):
      dictionary = {}
      for sample in samples:
          key, value = sample.split("->")
          dictionary[key] = value
      return dictionary