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: Accepted)

fn main() {
    let (a, b) = {
        let mut line = String::new();
        std::io::stdin().read_line(&mut line);
        let v: Vec<i32> = line.split_whitespace().map(|a|a.parse().unwrap()).collect();
        (v[0], v[1])
    };
    println!("{}", std::cmp::max(a + b, std::cmp::max(a - b, a * b)))
}