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++14 (GCC 5.4.1) (judge verdict: Accepted)

#include <stdio.h>

int sum(int arg1, int arg2) {
  return arg1 + arg2;
}

int sub(int arg1, int arg2) {
  return arg1 - arg2;
}

int mul(int arg1, int arg2) {
  return arg1 * arg2;
}

int main() {
  int N, M;
  scanf("%d %d", &N, &M);
  
  int val_sum = sum(N, M);
  int val_sub = sub(N, M);
  int val_mul = mul(N, M);
    
  if (val_sum > val_sub) {
    if (val_sum > val_mul) {
      printf("%d", val_sum);
    }
    else {
      printf("%d", val_mul);
    }
  }
  else {
    if (val_sub > val_mul) {
      printf("%d", val_sub);
    }
    else {
      printf("%d", val_mul);
    }
  }
}