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 mut n: usize = itr.next().unwrap().parse().unwrap();
    let mut out = Vec::new();
    while n > 0 {
        write!(out, "{}", n % 7).ok();
        n /= 7;
    }
    out.reverse();
    writeln!(out, "").ok();
    stdout().write_all(&out).unwrap();
}