Problem:
Score : 100 points

Problem Statement

We have two integers: A and B.

Print the largest number among A + B, A - B, and A \times B.

Constraints

All values in input are integers.

-100 \leq A,\ B \leq 100

Input

Input is given from Standard Input in the following format:

A B

Output

Print the largest number among A + B, A - B, and A \times B.

Sample Input 1

-13 3

Sample Output 1

-10

The largest number among A + B = -10, A - B = -16, and A \times B = -39 is -10.

Sample Input 2

1 -33

Sample Output 2

34

The largest number among A + B = -32, A - B = 34, and A \times B = -33 is 34.

Sample Input 3

13 3

Sample Output 3

39

The largest number among A + B = 16, A - B = 10, and A \times B = 39 is 39.

Solution in C (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

void max2(int x, int y){
  if(x>y)
    printf("%d\n", x);
  else
    printf("%d\n", y);
}

void max3(int x, int y, int z){
  if(x>y)
    max2(x, z);
  else
    max2(y, z);
}

int main(void){
  int a, b;
  scanf("%d %d", &a, &b);

  int x = a+b;
  int y = a-b;
  int z = a*b;

  max3(x, y, z);

  return 0;
}