fn main() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).ok();
    let s = s.trim();
    let m = s.matches('-').count() == 0;
    let s: String = s.chars().take(s.len() - 2).collect();
    println!("{}", if m { &s } else { "0" });
}