use std::process;

fn main() {
    let cc: Vec<char> = {
        let mut line = String::new();
        std::io::stdin().read_line(&mut line).unwrap();
        line.trim().chars().collect()
    };

    if cc[0] == '-' || cc.len() <= 2 {
        println!("0");
        process::exit(0);
    }

    let ans: String = cc.iter().take(cc.len() - 2).collect();
    println!("{}", ans);
}