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)

#include <stdio.h>
#include <stdlib.h>

int main()
{
    int a,b,m,n,z;
    while(~scanf("%d%d",&a,&b))
    {
        m=0;
        if(a==0&&b==0)
            printf("%d\n",m);
        else if(a-(b)>a+(b))
            printf("%d\n",a-(b));
        else if(a+(b)>a*b)
            printf("%d\n",a+(b));
        else if(a-(b)>a*b)
            printf("%d\n",a-(b));
        else if(a+(b)>a-(b))
            printf("%d\n",a+(b));
        else
            printf("%d\n",a*b);
    }
    return 0;
}