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Verilog
def print_func(not_arrived_quests): print(len(not_arrived_quests)) for person in sorted(not_arrived_quests): print(person) n = int(input()) invited_guests = set() arrived_quests = set() for _ in range(n): guest = input() invited_guests.add(guest) while True: data = input() if data == "END": break arrived_quests.add(data) missed_quests = invited_guests.difference(arrived_quests) print_func(missed_quests)
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