import java.util.*;
import java.math.*;

public class Main {
	static Scanner sc = new Scanner(System.in);
	public static void main(String[] args) {
		int w = sc.nextInt();
		int d = sc.nextInt();
		double a = 0;
		while (true) {
			if (d==1) {break;}
			else {
				a = Math.floor(w/(d*d));
				w -= (int)a;
				d--;
			}
		}
		System.out.println(w);
	}
}