银行账户系统

def solve():
    class BankAccount:
        def __init__(____):
            self._balance = ____
        @property
        def balance(____):
            return self._balance
        def deposit(____):
            if amount > ____:
                self._balance += amount
        def withdraw(____):
            if amount > self._balance:
                print(____)
            else:
                self._balance -= amount
    acc = BankAccount()
    acc.deposit(____)
    acc.withdraw(____)
    print(____)