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,wa,sa,seki;
	scanf("%d %d",&a,&b);
	wa=a+b;
	sa=a-b;
	seki=a*b;
	if(sa<=wa && seki<=wa){
		printf("%d\n",wa);
	}
	else if(wa<=sa && seki<=sa){
		printf("%d\n",sa);
	}
	else{
		printf("%d\n",seki);
	}
	return 0;
}