import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		long W = scan.nextLong();
		long D = scan.nextLong();
		long r = 0;
		scan.close();
		while(D > 0) {
			r = W / (D *  D);
			W = W - r;
			D --;
		}
		System.out.println(r);
	}
}