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 argc, char const * argv[])
{
    int a, b;
    scanf("%d %d", &a,&b);
    int soma = (a)+(b);
    int dif = (a)-(b);
    int prod = (a)*(b);
    if(soma>dif && soma>prod){
        printf("%d\n",+soma);
    }else{
        if(dif>soma && dif>prod){
            printf("%d\n",+dif);
        }else{
            if(prod>soma && prod>dif){
               printf("%d\n",+prod); 
            }
        }
    }
}