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 9.2.1) (judge verdict: Accepted)

#include<stdio.h>
int main(){
    int a,b,d,e,f;
    scanf("%d%d",&a,&b);
    d = a-b;
    e = a*b;
    f = a+b;
    if (d>=e && d>=f)
        printf("%d",d);
    else if(e>=d && e>=f)
        printf("%d",e);
    else if (f>=d && f>=e)
        printf("%d",f);
    else if (a==0 && b==0)
        printf("%d",a);
        return 0;
}