ConcerSecondTry

import java.util.*;

public class Concert {

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // A map to store the bands and their members
        Map<String, List<String>> bands = new LinkedHashMap<>();
        // A map to store the bands and their time on stage
        Map<String, Integer> times = new TreeMap<>(Comparator.reverseOrder());
        // A variable to store the total time
        int totalTime = 0;
        // A variable to store the first band on stage
        String firstBand = "";

        // Read commands until "Start!" is entered
        String command = scanner.nextLine();
        while (!command.equals("Start!")) {
            // Split the command by space
            String[] tokens = command.split("\\s+");
            // If the command starts with "Add"
            if (tokens[0].equals("Add")) {
                // Get the band name and the members
                String bandName = tokens[1];
                List<String> members = new ArrayList<>(Arrays.asList(tokens).subList(2, tokens.length));
                // If the band does not exist in the map, add it with its members
                if (!bands.containsKey(bandName)) {
                    bands.put(bandName, members);
                } else {
                    // Otherwise, add only the members that are not already in the list
                    List<String> existingMembers = bands.get(bandName);
                    for (String member : members) {
                        if (!existingMembers.contains(member)) {
                            existingMembers.add(member);
                        }
                    }
                }
            }
            // If the command starts with "Play"
            if (tokens[0].equals("Play")) {
                // Get the band name and the time
                String bandName = tokens[1];
                int time = Integer.parseInt(tokens[2]);
                // If the band does not exist in the map, add it with its time
                if (!times.containsKey(bandName)) {
                    times.put(bandName, time);
                    // If this is the first band on stage, set it as such
                    if (firstBand.isEmpty()) {
                        firstBand = bandName;
                    }
                } else {
                    // Otherwise, increase the time by the given amount
                    times.put(bandName, times.get(bandName) + time);
                }
                // Increase the total time by the given amount
                totalTime += time;
            }
            // Read the next command
            command = scanner.nextLine();
        }

        // Print the total time
        System.out.println("Total time: " + totalTime);
        // Print the bands and their times in descending order
        for (Map.Entry<String, Integer> entry : times.entrySet()) {
            System.out.println(entry.getKey() + " -> " + entry.getValue());
        }
        // Print the first band on stage and its members in insertion order
        // Add a null check for the first band variable and a containsKey check for the bands map
        if (firstBand != null && bands.containsKey(firstBand)) {
            System.out.println(firstBand);
            for (String member : bands.get(firstBand)) {
                System.out.println("=>" + member);
            }
        }
    }
}