input: Write a function to classify dictionary items based on their values.
  assert classify({"A": 1, "B": 0, "C": 1, "D": 1, "E": 0}) == (['A', 'C', 'D'], ['B', 'E'])
  assert classify({"X": 2, "Y": 2, "Z": 1}) == (['Z'], ['X', 'Y'])
  assert classify({"P": 0, "Q": 0, "R": 0}) == ([], ['P', 'Q', 'R'])
  assert classify({"M": 1, "N": 1, "O": 1}) == (['M', 'N', 'O'], [])
output: def classify(d):
      true_values = [k for k, v in d.items() if v == 1]
      false_values = [k for k, v in d.items() if v != 1]
      return true_values, false_values