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;
	int add, sub, mul;
	int max;
	
	scanf("%d %d", &a, &b);
	add = a + b;
	sub = a - b;
	mul = a * b;
	
	if(add >= sub && add >= mul){
		max = add;
	}else if(sub >= add && sub >= mul){
		max = sub;
	}else{
		max = mul;
	}
	
	printf("%d\n", max);
	return 0;
}