JF-Maps-Exercise-05.SoftUniParking

package com.company;

import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;

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

        LinkedHashMap<String, String> users = new LinkedHashMap<>();

        int n = Integer.parseInt(sc.nextLine());

        for (int i = 0; i < n; i++) {
            String[] input = sc.nextLine().split(" ");
            String token = input[1];
            if (input[0].equals("register")) {
                if (users.containsKey(token)) {
                    System.out.println("ERROR: already registered with plate number " + input[2]);
                } else {
                    System.out.printf("%s registered %s successfully%n", input[1], input[2]);
                    users.put(input[1], input[2]);
                }

            } else if (input[0].equals("unregister")) {
                if (users.containsKey(token)) {
                    System.out.println(input[1] + " unregistered successfully");
                    users.remove(input[1]);
                } else {
                    System.out.printf("ERROR: user %s not found%n", input[1]);
                }
            }

       }
        for (Map.Entry<String, String> entry : users.entrySet()) {
            System.out.printf("%s => %s%n", entry.getKey(), entry.getValue());
        }
    }
}