JF-Exams-PracticeSessions

package com.company;

import java.util.*;

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

        String input = sc.nextLine();
        Map<String, List<String>> roads = new LinkedHashMap<>();
        String road = "";
        String racer = "";


        while (!input.equals("END")) {

            String[] tokens = input.split("->");
            String command = tokens[0];
            road = tokens[1];

            switch (command) {
                case "Add":
                    racer = tokens[2];
                    roads.putIfAbsent(road, new ArrayList<>());
                    roads.get(road).add(racer);
                break;

                case "Move":
                    racer = tokens[2];
                    String nextRoad = tokens[3];
                    if (roads.get(road).contains(racer)) {
                        roads.get(nextRoad).add(racer);
                        roads.get(road).remove(racer);

                    }
                    break;

                case "Close":
                    if (roads.containsKey(road)) {
                        roads.remove(road);
                    }
                    break;
            }

            input = sc.nextLine();
        }
        System.out.println("Practice sessions:");
        roads.entrySet().stream().sorted((f,s) -> {
            int result = s.getValue().size()- f.getValue().size();
            if (result == 0) {
                result = f.getKey().compareTo(s.getKey());
            }
            return result;
        }).forEach(e -> {System.out.println(e.getKey());
            e.getValue().stream().forEach(d -> System.out.printf("++%s%n", d));

        });
    }
}