#include<bits/stdc++.h>
using namespace std;
int main(){
  
  int a,b;
  cin>>a>>b;
  cout<<max(a+b,max(a-b,a*b))<<"\n";
}

### Prompt

In cpp, your task is to solve 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;
  cin>>a>>b;
  cout<<max(a+b,max(a-b,a*b))<<"\n";
}

```