fn main() {
    let mut n: usize = read();

    let mut digit: isize = -1;
    while n != 0 {
        n /= 2;
        digit += 1;
    }
    
    println!("{}", 2isize.pow(digit as u32));
}

fn read<T: std::str::FromStr>() -> T {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    s.trim().parse().ok().unwrap()
}