Otra de las soluciones es: import java.io.; import java.math.; import java.security.; import java.text.; import java.util.; import java.util.concurrent.; import java.util.regex.*;

public class Solution {

private static final Scanner scanner = new Scanner(System.in);

public static void main(String[] args) {
    int n = scanner.nextInt();
    scanner.skip("(\r\n|[\n\r\u2028\u2029\u0085])?");

    System.out.println(
(N % 2 != 0 || (N >= 6 && N <= 20)) ? "Weird" : "Not Weird");        

    scanner.close();
}

}

Si N es impar (N % 2 != 0), siempre imprime "Weird"

Si N es par:

    Entre 2 y 5: "Not Weird"

    Entre 6 y 20: "Weird"

    Mayor que 20: "Not Weird"