import java.util.*;
import java.math.*;
import java.io.*;
 
public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int d = sc.nextInt();
		for(int i = d; i > 1; i--) w -= (w / ((long)i * i));
		System.out.println(w);
	}
}