package yukicoder;

import java.util.Scanner;

public class No_051 {// やる気の問題
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int W = sc.nextInt();
		int D = sc.nextInt();
		sc.close();
		for (int i = D; i > 1; i--) {
			int tmp = W / i  / i;
			W -= tmp;
		}
		System.out.println(W);
	}
}