CheckbookRegister | Topcoder Archive

Problem Statement

You need to update the balance in your checkbook. You know your starting balance, the total amount spent using your debit card, and the total value of checks that have been written. Return your ending balance.

Definition

Class:: CheckbookRegister
Method:: updateBalance
Parameters:: int, int, int
Returns:: int
Method signature:: int updateBalance(int startingBalance, int debits, int checks)
(be sure your method is public)

Notes

Just like in real life, it's possible for you to end up negative.

Constraints

startingBalance will be between 1 and 10000, inclusive.
debits will be between 0 and 10000, inclusive.
checks will be between 0 and 10000, inclusive.

Examples

```
1000
```
```
100
```
```
200
```
```
Returns: 700
```
You had 1000, withdrew 100 at an ATM, and wrote a check for 200. That leaves you with 700. (1000 - 100 - 200 = 700)
```
500
```
```
210
```
```
290
```
```
Returns: 0
```
You're all out of money.
```
800
```
```
0
```
```
0
```
```
Returns: 800
```
You haven't spent any of your money in this case.
```
500
```
```
300
```
```
450
```
```
Returns: -250
```
Oops... you overdrew your account.

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