import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main{
	public static void main(String[] args) {
		try (BufferedReader br = new BufferedReader(new InputStreamReader(System.in))) {
			long w = Integer.parseInt(br.readLine());
			int d = Integer.parseInt(br.readLine());
			int moto = 0;

			while (d > 0) {
				moto = (int)w / d / d;
				w -= moto;
				d--;
			}
			System.out.println(moto);

		} catch (IOException e) {
			e.printStackTrace();
		}
	}
}