class Account {

    protected String accountNumber;
    protected double balance;

    public Account(String accountNumber, double initialBalance) {
        this.accountNumber = accountNumber;
        this.balance = initialBalance;
    }

    public void deposit(double amount) {
        balance += amount;
        System.out.println(accountNumber + ": Deposited " + amount + ", new balance = " + balance);
    }

    public void withdraw(double amount) {
        if (balance >= amount) {
            balance -= amount;
            System.out.println(accountNumber + ": Withdrew " + amount + ", new balance = " + balance);
        } else {
            System.out.println(accountNumber + ": Insufficient balance to withdraw " + amount);
        }
    }

    public double getBalance() {
        return balance;
    }

    public String getAccountNumber() {
        return accountNumber;
    }
}

class SavingsAccount extends Account {

    private double interestRate; // e.g., 0.05 = 5%

    public SavingsAccount(String accountNumber, double initialBalance, double interestRate) {
        super(accountNumber, initialBalance);
        this.interestRate = interestRate;
    }

    public void applyInterest() {
        double interest = balance * interestRate;
        deposit(interest);
        System.out.println(accountNumber + ": Interest applied: " + interest);
    }

    public double getInterestRate() {
        return interestRate;
    }
}

class CheckingAccount extends Account {

    private double overdraftLimit;

    public CheckingAccount(String accountNumber, double initialBalance, double overdraftLimit) {
        super(accountNumber, initialBalance);
        this.overdraftLimit = overdraftLimit;
    }

    @Override
    public void withdraw(double amount) {
        if (balance + overdraftLimit >= amount) {
            balance -= amount;
            System.out.println(accountNumber + ": Withdrew " + amount + ", new balance = " + balance);
        } else {
            System.out.println(accountNumber + ": Exceeded overdraft limit! Cannot withdraw " + amount);
        }
    }

    public double getOverdraftLimit() {
        return overdraftLimit;
    }
}

public class Example02 {
    public static void main(String[] args) {
        SavingsAccount savings = new SavingsAccount("SAV-001", 1000, 0.05);
        CheckingAccount checking = new CheckingAccount("CHK-001", 500, 200);

        // Common behavior
        savings.deposit(200);
        checking.withdraw(600);

        // Specialized behavior
        savings.applyInterest();
        checking.withdraw(200); // triggers overdraft

        System.out.println("Savings balance: " + savings.getBalance());
        System.out.println("Checking balance: " + checking.getBalance());
    }
}