use std::io::*;

fn main() {
    let mut s: String = String::new();
    std::io::stdin().read_to_string(&mut s).ok();
    let mut itr = s.trim().split_whitespace();
    let n: u64 = itr.next().unwrap().parse().unwrap();
    let mut ans = 1;
    for _ in 0..128 {
        ans = (ans << 1) % n;
    }
    println!("{}", ans);
}