use std::io::Read;

fn r(w: u32, d: u32) -> u32 {
	match d {
		1 => w,
		_ => r(w.saturating_sub(w / d.pow(2)), d - 1),
	}
}

fn main() {
	let mut s = String::new();
	std::io::stdin().read_to_string(&mut s).ok();
	let n: Vec<u32> = s.split_whitespace().flat_map(str::parse).collect();
	println!("{}", r(n[0], n[1]));
}