Problem:
Score : 100 points

Problem Statement

We have two integers: A and B.

Print the largest number among A + B, A - B, and A \times B.

Constraints

All values in input are integers.

-100 \leq A,\ B \leq 100

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest number among A + B, A - B, and A \times B.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among A + B = -10, A - B = -16, and A \times B = -39 is -10.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

The largest number among A + B = 16, A - B = 10, and A \times B = 39 is 39.

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

#include <stdio.h>

int main(void)
{
        int a,b,s1,s2,s3;
        scanf("%d%d",&a,&b);

        s1=a+b;
        s2=a-b;
        s3=a*b;

        if(s1>s2 && s1>s3)  printf("%d\n",s1);
        else if(s1<s2 && s2>s3)printf("%d\n",s2);
        else if(s1<s2 && s2<s3) printf("%d\n",s3);
        return 0;
}