fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: usize = n.trim().parse().unwrap();
    let mut ans = String::new();
    while n != 0 {
        ans += &(n % 7).to_string();
        n /= 7;
    }
    println!("{}", ans.chars().rev().collect::<String>());
}