input: Write a function to build a dictionary from a list of samples where each sample is a string in the format "key->value". If the 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