fn main() {
    let mut nk = String::new();
    std::io::stdin().read_line(&mut nk).ok();
    let nk: Vec<usize> = nk.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();
    let n = nk[0];

    for i in 2..=n/2 {
        if n % i == 0 {
            println!("{}", n / i);
            return;
        }
    }
    println!("{}", 1);
}