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>

int main()
{
	int a,b,arr[9],r,i,j;
	scanf("%d %d",&a,&b);

	arr[1]=a+b;
	arr[2]=a-b;
	arr[3]=b-a;
	arr[4]=a*b;

	for(i=1;i<=4;i++)
    {
        for(j=i;j<=4;j++)
        {
            if(arr[j]>=arr[i])
            {
                r=arr[i];
                arr[i]=arr[j];
                arr[j]=r;
            }
        }
    }

    printf("%d",arr[1]);

    return 0;

}