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 (Clang 3.8.0) (judge verdict: Accepted)

#include <stdio.h>
#include <math.h>

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

        s1 = a+b;
        s2 = a-b;
        s3 = a*b;
        max=s1;
        if(s2 > max)max=s2;
        if(s3 > max)max=s3;

    printf("%d\n",max);
    return 0;
}