fn read() -> (usize, usize) {
    let mut buf = String::new();
    std::io::stdin().read_line(&mut buf).unwrap();
    let v = buf
        .trim()
        .split_ascii_whitespace()
        .map(|e| e.parse().unwrap())
        .collect::<Vec<_>>();
    (v[0], v[1])
}

fn solve(trick: usize, treat: usize) -> u128 {
    (1..=(trick | treat) as u128).product()
}

fn main() {
    let (trick, treat) = read();
    println!("{}", solve(trick, treat));
}