use std::{collections::HashSet, io};

fn main() {
    let n = read_line();
    let ret = run(n);
    println!("{}", ret);
}

fn run(mut n: String) -> usize {
    let mut set = HashSet::new();
    for i in 0..=n.len() {
        for x in '0'..='9' {
            n.insert(i, x);
            if !n.starts_with("0") {
                set.insert(n.clone());
            }
            n.remove(i);
        }
    }
    set.len()
}

fn read_line() -> String {
    let mut line = String::new();
    io::stdin().read_line(&mut line).unwrap();
    line.trim().to_string()
}