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 max(int,int,int);

int main(void){
    int a,b;
    scanf("%d %d",&a,&b);
    
    int c,d,e;
    c=a+b;
    d=a-b;
    e=a*b;
    
    printf("%d",max(c,d,e));
    return 0;
}

int max(a,b,c){
    int max;
    max=a;
    if(b>max){max=b;}
    if(c>max){max=c;}
    
    return max;
}