import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        try {
            int accountNumber = sc.nextInt();
            float accountBalance = sc.nextFloat();

            if (accountNumber >= -500 && accountNumber <= 500 &&
                accountBalance >= 0 && accountBalance <= 1000) {
                System.out.println("true");
            } else {
                System.out.println("false");
            }
        } catch (Exception e) {
            System.out.println("Invalid input");
}
}
}