import java.util.Scanner;

public class Main {

    public static Scanner sc = new Scanner(System.in);
    public static String[] acc = new String[2];
    public static String key = "quit";
    public static void main(String[] args) {
        int a = 0;
        do {
            System.out.println("Would you like to log-in(1) or register[2]?");
            a = sc.nextInt();
        } while( a > 2 || a < 1);

        System.err.println("If you wish to close the terminal - type 'quit' in both username and password!");
        if(a == 1) Login();
        else if(a == 2) Register();
    }

    public static void Register() {
        System.out.print("Please enter a username: ");
        acc[0] = sc.next();
        System.out.print("Please enter a password: ");
        acc[1] = sc.next();
        if(acc[0].equals(key) || acc[1].equals(key)) System.err.println("Terminal Shut Down!");
        else {
            System.out.println("You have successfully registered, " + acc[0] + "!");
            Login();
        }
    }

    public static void Login() {
        String name, pass;
        System.out.print("Please enter username: ");
        name = sc.next();
        System.out.print("Please enter password: ");
        pass = sc.next();

        if(name.equals(acc[0]) && pass.equals(acc[1])) System.out.println("Welcome, " + acc[0] + "!");
        else if(name.equals(key) || pass.equals(key)) System.err.println("Terminal Shut Down!");
        else {
            System.out.println("Account not found! Please register!");
            Register();
        }
    }
}