use proconio::{fastout, input};

#[fastout]
fn main() {
    input! {
        trick: u8,
        treat: u8,
    }

    println!("{}", output(solve(trick, treat)));
}

fn solve(trick: u8, treat: u8) -> u64 {
    (1..=(trick | treat)).map(|x| x as u64).product()
}

fn output(ans: u64) -> u64 {
    ans
}