fn main() {
    let mut l = String::new();
    std::io::stdin().read_line(&mut l).ok();
    let l: usize = l.trim().parse().unwrap();
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();

    let cands: usize = l - 3;
    let cands: usize = 2usize.pow(cands as u32);
    let result: usize = cands * n;
    println!("{}", result);
}