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(void)
{
    int a, b, sum, dif, pro, res;
    scanf("%d %d", &a, &b);
    sum = a + b;
    dif = a - b;
    pro = a * b;

   if(sum >= dif){
       if(sum >= pro){
           res = sum;
       }else if(pro > sum){
           res = pro;
       }
   }

   if(dif > sum){
       if(dif >= pro){
           res = dif;
       }else if(pro > dif){
           res = pro;
       }
   }

   printf("%d\n", res);

   return 0;
}