10. Invalid Number

import java.util.Scanner;

public class InvalidNumber {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);

        int A = Integer.parseInt(scanner.nextLine());

        if ( A==0){
            System.out.println();
        }else if(A>=100 && A<=200 ){
            System.out.println();
        }else{
            System.out.println("invalid");
        }
    }
}