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;
  scanf("%d %d",&a,&b);
  int c=a+b;
  int d=a*b;
  int e=a-b;
  int ans=0;
  if(c<d)
    {
      if(d<e)
	{
	  ans=e;
	}
      else
	{
	  ans=d;
	}
    }
  if(c>d)
    {
      if(c<e)
	{
	  ans=e;
	}
      else
	{
	  ans=c;
	}
    }
  printf("%d\n",ans);
  return 0;
}