import java.util.Scanner;

public class Main {
	public static void main(String[] args) {
		Scanner sc = new Scanner(System.in);
		int w = sc.nextInt();
		int d = sc.nextInt();
		sc.close();
		int work = 0;;
		if(d == 0){
			work = w;
		}else{
			for(int i=0, d2=d; i<d2; i++){
				work = w / (d * d);
				w -= work;
				d--;
			}
		}
		System.out.println(work);
	}
}