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>
#include <stdlib.h>

int main()
{ int n,m,a,b,c;
  while(~scanf("%d %d",&n,&m))
  {  a=n+m;
     b=n-m;
     c=n*m;
     if(a>b&&a>c)
        printf("%d\n",a);
     else   if(b>a&&b>c)
        printf("%d\n",b);
    else    if(c>b&&c>a)
        printf("%d\n",c);
     else   if(n==0&&m==0)
            printf("0\n");

  }
    return 0;
}