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import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.nio.charset.StandardCharsets; import java.util.*; // Data Classes class AddOrder { public int orderId; public String artist; public double price; public int quantity; public AddOrder(int o, String a, double p, int q) { orderId = o; artist = a; price = p; quantity = q; } } class DeleteOrder { public int orderId; public String artist; public DeleteOrder(int o, String a) { orderId = o; artist = a; } } class DeletePriceLevel { public String artist; public double price; public DeletePriceLevel(String a, double p) { artist = a; price = p; } } // TODO(candidate): implementation below class PriceLadder { public PriceLadder() { // TODO(candidate): implement } public void AddOrder(AddOrder order) { // TODO(candidate): implement } public void DeleteOrder(DeleteOrder delete) { // TODO(candidate): implement } public void DeletePriceLevel(DeletePriceLevel deletePriceLevel) { // TODO(candidate): implement } public void GetPriceLevels(String artist, int numberOfPriceLevels) { // TODO(candidate): implement } } /** * The Main class implements an application that reads lines from the standard input * and prints them to the standard output. */ public class Main { /** * Iterate through each line of input. */ public static void main(String[] args) throws IOException { InputStreamReader reader = new InputStreamReader(System.in, StandardCharsets.UTF_8); BufferedReader in = new BufferedReader(reader); var priceLadder = new PriceLadder(); String line; while ((line = in.readLine()) != null) { var tokens = line.split("\\s+"); if (tokens[0].equals("ADD")) { priceLadder.AddOrder(new AddOrder(Integer.parseInt(tokens[1]), tokens[2], Integer.parseInt(tokens[3]), Integer.parseInt(tokens[4]))); } else if (tokens[0].equals("DEL")) { priceLadder.DeleteOrder(new DeleteOrder(Integer.parseInt(tokens[1]), tokens[2])); } else if (tokens[0].equals("DEL_PRICE")) { priceLadder.DeletePriceLevel(new DeletePriceLevel(tokens[1], Double.parseDouble(tokens[2]))); } else { String artist = tokens[0]; var numberOfPriceLevels = Integer.parseInt(tokens[1]); priceLadder.GetPriceLevels(artist, numberOfPriceLevels); } } } }