highways

import java.util.Scanner;

public class test {
    public static void main(String[] args) {
        Scanner scnr = new Scanner(System.in);
        int highwayNumber;
        int primaryNumber;

        highwayNumber = scnr.nextInt();
        // %100,
        primaryNumber = highwayNumber % 100;
        if ((highwayNumber < 1) || (highwayNumber > 999) || (highwayNumber % 100 == 0)) {
            System.out.println(highwayNumber + " is not a valid interstate highway number.");
        } else if (highwayNumber < 99 && highwayNumber > 1) {
            if (highwayNumber % 2 == 0) {
                System.out.println("I-" + highwayNumber + " is primary, going east/west.");
            } else{
                System.out.println("I-" + highwayNumber + " is primary, going north/south.");
            }
        }if (highwayNumber > 99 && highwayNumber < 999) {

            if (highwayNumber % 2 == 0) {
                System.out.println("I-" + highwayNumber + " is auxiliary, serving I-" + primaryNumber + ", going east/west.");
            } else {
                System.out.println("I-" + highwayNumber + " is auxiliary, serving I-" + primaryNumber + ", going north/south.");
            }
        }

    }
}