fn main() {
    let mut input = String::new();
    std::io::Read::read_to_string(&mut std::io::stdin(), &mut input).ok();
    let input = input
        .split_whitespace()
        .map(|n| n.parse::<i64>().unwrap())
        .collect::<Vec<_>>();

    println!("{}", input[0] - -input[1]);
}