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 n,a,b,c,y,z,x,s[0],t;
    while(~scanf("%d %d",&a,&b))
    {
        s[0]=a+b;
        s[1]=a-b;
        s[2]=a*b;
        for(c=0;c<2;c++)
        {
            for(y=c+1;y<3;y++)
            {
                if(s[c]<s[y])
                {
                    t=s[c];
                    s[c]=s[y];
                    s[y]=t;
                }
            }
        }
        printf("%d\n",s[0]);

    }
    return 0;
}