import java.util.*;

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