fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let mut n: usize = n.trim().parse().unwrap();
    let org_n: usize = n;

    let mut result: Vec<usize> = vec![];
    while n > 0 {
        result.push(n % 7);
        n /= 7;
    }
    if org_n == 0 {
        println!("0");
    } else {
        println!("{}", result.iter().rev().map(|i| i.to_string()).collect::<Vec<String>>().join(""));
    }
}