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 Rust (1.15.1) (judge verdict: Runtime Error)

use std::io::{self, Read};
use std::cmp;
 
fn main() {
    let mut buffer = String::new();
    io::stdin().read_to_string(&mut buffer).unwrap();
    let v: Vec<i32> = buffer.split(' ').map(|x| x.parse().unwrap()).collect();
    println!("{}",cmp::max(v[0]-v[1],cmp::max(v[0]+v[1],v[0] * v[1])));
}