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- package com.company;
- import java.util.LinkedHashMap;
- import java.util.Map;
- import java.util.Scanner;
- public class Parking {
- public static void main(String[] args) {
- Scanner scanner = new Scanner(System.in);
- Map <String, String> usersLicensePlate = new LinkedHashMap<>();
- int line = Integer.parseInt(scanner.nextLine());
- String [] tokens = scanner.nextLine().split("\\s+");
- for (int i = 0; i < line; i++) {
- String register = tokens [0];
- String user = tokens [1];
- if (register.equals("register")) {
- String licensePlate = tokens [2];
- if (usersLicensePlate.containsKey(user)) {
- System.out.printf("ERROR: already registered with plate number %s%n", licensePlate);
- } else {
- usersLicensePlate.put(user, licensePlate);
- System.out.printf("%s registered %s successfully%n", user, licensePlate);
- }
- }
- if (register.equals("unregister")){
- if (!usersLicensePlate.containsKey(user)) {
- System.out.printf("ERROR: user %s not found%n", user);
- } else {
- usersLicensePlate.remove(user);
- System.out.printf("%s unregistered successfully%n", user);
- }
- }
- tokens = scanner.nextLine().split("\\s+");
- }
- usersLicensePlate
- .forEach((k, v) -> System.out.printf("%s => %s%n", k, v));
- }
- }
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