use std::cmp::{max, min};

fn gcd(a: u128, b: u128) -> u128 {
    if a % b == 0 {
        return b;
    }
    gcd(b, a % b)
}

fn main() {
    let mut ab = String::new();
    std::io::stdin().read_line(&mut ab).ok();
    let ab: Vec<u128> = ab.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let a = ab[0];
    let b = ab[1];
    let aa = a * b;
    let bb = a + b;
    println!("{}", gcd(max(aa, bb), min(aa, bb)));
}