import static java.lang.Math.pow;
import static java.lang.Math.sqrt;
import java.util.Scanner;


public class Main {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        // TODO code application logic here
        Scanner input=new Scanner(System.in);
        while(input.hasNext()){
        int x,y,i,count=0;
        x=input.nextInt();
        y=input.nextInt();
        if(x==0&&y==0){
            break;
        }
        else{
        for(i=x;i<=y;i++){
            int temp=(int) Math.sqrt(i);

            if(i==Math.pow(temp,2)){
            count++;
        }
        }
            System.out.println(count);
        }
        }

    }

}