fn getline() -> String {
    let mut s = String::new();

    std::io::stdin().read_line(&mut s).ok();

    s.trim().to_string()
}

fn number_to_string(n: u64, radix: u64) -> String {
    let mut rv = Vec::new();
    let mut m = n;

    while radix <= m  {
        let r = m % radix;

        rv.push(r.to_string());
        m = m / radix;
    }

    rv.push(m.to_string());
    rv.reverse();
    rv.concat()
}

fn main() {
    let s = getline();
    let n: u64 = s.trim().parse().unwrap();

    println!("{}", number_to_string(n, 7));
}