fn read_vec<T: std::str::FromStr>() -> Vec<T> {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().split_whitespace()
        .map(|e| e.parse().ok().unwrap()).collect()
}

fn main() -> Result<(), std::io::Error> {
    let v = read_vec::<i32>();

    let n = v[0];
    let k = v[1];

    let max_value = 1 << n;
    let tar_value = 1 << k;
    let cnt = max_value / tar_value;
    println!("{}", cnt);

    Ok(())
}