package yukicoder;

import java.util.Scanner;

public class Yuki51 {
	
	public static void main(String[] args) {
		
		Scanner scan = new Scanner(System.in);
		int w = scan.nextInt();
		int d = scan.nextInt();
		scan.close();
		for(int i = d; i>0; i--){
			if(i == 1) {
				System.out.println(w);
				break;
			}
			try {
				double num = Math.floor((double)w/((double)i*(double)i));
				w -= (int)num;				
			} catch (Exception e) {
				// TODO: handle exception
				System.out.println(e);
			}

		}
	}
}