class Account:
    def __init__(self, balance):
        self._balance = balance

    def deposit(self, amount):
        self._balance += amount

    def withdraw(self, amount):
            self._balance -= amount
            if self._balance < 0:
                print("잔액 부족!")

    def get_balance(self):
        return self._balance

account = Account(1000)
account.deposit(500)
account.withdraw(200)
print("잔액:", account.get_balance())