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>

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