#61MediumClasses· Classes and Inheritance

Class: Bank Account System

Model bank accounts with two classes. Amounts are whole numbers of cents, so there is no floating-point rounding. **`BankAccount(owner, overdraft_limit)`** - `deposit(amount)`: if `amount > 0`, add it and return `True`; otherwise change nothing and return `False`. - `withdraw(amount)`: return `False` (and change nothing) if `amount <= 0` or if the balance would fall below `-overdraft_limit`; otherwise subtract it and return `True`. - `get_balance()`: the current balance (starts at 0). - `statement()`: one line per successful transaction, in order, formatted `"<type> <amount> -> <balance after>"`, for example `"deposit 500 -> 500"`. **`SavingsAccount(owner, rate_percent)`** inherits from `BankAccount` with an overdraft limit of 0 and adds: - `add_interest()`: adds `balance * rate_percent // 100` cents when that amount is positive, records it as an `interest` line, and returns the new balance. Each test creates one account (the first operation names the class) and then calls its methods. The output lists each call's return value, with `null` for the constructor.

Input format

`operations`: the class name followed by method names. `arguments`: the argument list for each operation.

Output format

A list with the return value of each operation (`null` for the constructor).

Examples

Input: operations = ["BankAccount","deposit","withdraw","withdraw","get_balance","statement"], arguments = [["Ana",100],[500],[550],[100],[],[]]

Output: [null,true,true,false,-50,["deposit 500 -> 500","withdraw 550 -> -50"]]

After depositing 500 and withdrawing 550 the balance is -50, which the overdraft of 100 allows. Withdrawing 100 more would reach -150, so it is refused and not recorded.

Input: operations = ["SavingsAccount","deposit","add_interest","withdraw","statement"], arguments = [["Ben",5],[1000],[],[2000],[]]

Output: [null,true,1050,false,["deposit 1000 -> 1000","interest 50 -> 1050"]]

5% of 1000 is 50. A savings account has no overdraft, so withdrawing 2000 fails.

Constraints

1 <= len(operations) <= 100
0 <= overdraft_limit <= 10^6
0 <= rate_percent <= 100
-10^6 <= amount <= 10^6

#python
#oop
#classes
#inheritance