// editor1
import java.util.Scanner;
public class Main{
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        if(!sc.hasNextInt() && accn>=0 && accb>=0){
            System.out.println("Invalid input");
        }
        int accn=sc.nextInt();
        float accb=sc.nextFloat();
        if(accn>=-500 && accn<=500 && accb>=-1000&&accb<=1000){
                System.out.println("true");
            }else{
                System.out.println("false");
            }
        }
        
    }