fn getline() -> String {
    let mut s = String::new();

    std::io::stdin().read_line(&mut s).ok();

    s
}

fn main() {
    let line = getline();
    let vec: Vec<u64> = line.trim().split(' ')
        .map(|s| s.parse().unwrap()).collect();

    println!("{}", (vec[0] / (vec[1] + 1)) + 1);
}