use std::io::*;
pub fn main() {
    let mut buf = String::new();
    let _ = stdin().read_line(&mut buf);
    let mut v = buf.split_whitespace().flat_map(|x| x.parse::<usize>());
    let (s, f) = (v.next().unwrap(), v.next().unwrap());
    println!("{}", s / f + 1);
}