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: Accepted)

#include<stdio.h>

int a, b, c, d, e;

int main()
{
    scanf("%d %d", &a, &b);

    if(b < 0)
    {
        if(a < 0)
            printf("%d\n", a*b);

        else
            printf("%d\n", a-b);
    }
    else
    {
        if(a+b <= a*b)
            printf("%d\n", a*b);

        else
            printf("%d\n", a+b);
    }

    return 0;
}