#include <iostream>

using namespace std;

int main(void) {
	int A,B;
	cin >> A >> B;
	cout << max(max(A+B,A-B),A*B) << endl;
	return 0;
}

### Prompt

Your challenge is to write a cpp solution to the following problem:

You are given two integers A and B. Find the largest value among A+B, A-B and A \times B.

Constraints

* -1000 \leq A,B \leq 1000
* All values in input are integers.

Input

Input is given from Standard Input in the following format:


A B


Output

Print the largest value among A+B, A-B and A \times B.

Examples

Input

3 1


Output

4


Input

4 -2


Output

6


Input

0 0


Output

0

### Response

```cpp
#include <iostream>

using namespace std;

int main(void) {
	int A,B;
	cin >> A >> B;
	cout << max(max(A+B,A-B),A*B) << endl;
	return 0;
}

```