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 main()
{
    int A, B, x, y, z;
    scanf("%d",&A);
    scanf("%d",&B);
    x=A+B;
    y=A-B;
    z=A*B;
    if (A==0 && B==0)printf("0\n");
    else if(x>=y && x>z)
    {
        printf("%d\n",x);
    }
    else if(y>x && y>z)
    {
        printf("%d\n",y);
    }
    else if(z>x && z>y) printf("%d\n",z);
    return 0;
}