fn run() {
    let mut s = String::new();
    std::io::stdin().read_line(&mut s).unwrap();
    let mut it = s.trim().split_whitespace();
    let t: Vec<char> = it.next().unwrap().chars().collect();
    let a: i128 = t.iter().cloned().collect::<String>().parse().unwrap();
    let s: Vec<char> = it.next().unwrap().chars().collect();
    let b: i128 = s.iter().cloned().collect::<String>().parse().unwrap();
    if s[0] == '-' {
        println!("{}", a + b);
    } else {
        let len = s.len();
        let m = 10i128.pow(len as u32);
        let mut ans = m * a;
        if t[0] == '-' {
            ans -= b;
        } else {
            ans += b;
        }
        println!("{}", ans);
    }
}

fn main() {
    run();
}