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()
{
   double a,b,w,s,x;
   while(~scanf("%lf%lf",&a,&b))
   {
       w=a+b;
       s=a-b;
       x=a*b;
       if(w>=s&&w>=s)
        printf("%.0lf\n",w);
        else if(s>=w&&s>=x)
            printf("%.0lf\n",s);
        else
            printf("%.0lf\n",x);

   }
}