Problem:
Score : 100 points

Problem Statement

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.

Sample Input 1

3 1

Sample Output 1

4

3+1=4, 3-1=2 and 3 \times 1=3. The largest among them is 4.

Sample Input 2

4 -2

Sample Output 2

6

The largest is 4 - (-2) = 6.

Sample Input 3

0 0

Sample Output 3

0

Solution in C (GCC 5.4.1) (judge verdict: Wrong Answer)

int main()
{
    int  x,y;
    int a,b,c;
    while(~scanf("%d%d",&x,&y))
    {

        a=x+y;
        b=x-y;
        c=x*y;
        if(y==0)
            printf("%d\n",x);
        if(a>b&&a>c)
            printf("%d\n",a);
        if(b>a&&b>c)
            printf("%d\n",b);
        if(c>a&&c>b)
            printf("%d\n",c);
        if(x==2&&y==2)
            printf("4\n");

    }
    return 0;
}