#include<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b;
	c=a+b;
	c=c>a-b?c:a-b;
	c=c>a*b?c:a*b;
	cout<<c;
} 
### 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<bits/stdc++.h>
using namespace std;
int main(){
	int a,b,c;
	cin>>a>>b;
	c=a+b;
	c=c>a-b?c:a-b;
	c=c>a*b?c:a*b;
	cout<<c;
} 
```