#include<iostream>
#include<algorithm>
using namespace std;
int main()
{
   int x,y;
   cin>>x>>y;
   cout<<max({x+y,x-y,x*y})<<endl;
}
### 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>
#include<algorithm>
using namespace std;
int main()
{
   int x,y;
   cin>>x>>y;
   cout<<max({x+y,x-y,x*y})<<endl;
}
```