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: Runtime Error)

#include<stdio.h>
int main(){
	long int x, y, a, b, c;
	scanf("%d %d",  &x, &y);
	if( x == 0 && y==0){
		printf("%d",x);
	}
	a = x + y;
    b = x - y;
    c =  x / y;
    if ( a> b &&a>c){
    	printf("%d",a);
	}else if(b>a && b>c){
		printf("%d",b);
	}else{
		printf("%d",c);
	}
	return 0;
}