fn main() {
    let mut w = String::new();
    std::io::stdin().read_line(&mut w).ok();
    let mut w: usize = w.trim().parse().unwrap();
    let mut d = String::new();
    std::io::stdin().read_line(&mut d).ok();
    let d: usize = d.trim().parse().unwrap();

    for i in (2..=d).rev() {
        let today: usize = w / (i*i);
        w -= today;
    }

    println!("{}", w);
}