package yukicoder;

import java.util.Scanner;

public class N51 {
	public static void main(String[] args){
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int d = sc.nextInt();
		for(int i = 0;i < d - 1;++i){
			w -= Math.floor(w/(Math.pow(d - i, 2)));
		}
		System.out.println(w);
	}
}