Technology Fundamentals Retake Mid Exam - 16 April 2019,задача 03

import java.util.ArrayList;
import java.util.List;
import java.util.Scanner;
import java.util.Arrays;

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

        String[] shops = sc.nextLine().split(" ");
        List<String> shopLine = new ArrayList<>();
        int N = Integer.parseInt(sc.nextLine());

        for (int i = 0; i < shops.length; i++) {
            shopLine.add(shops[i]);
        }
        for (int n = 1; n <= N; n++) {
            String[] commands = sc.nextLine().split(" ");

            switch (commands[0]) {
                case "Include":
                    shopLine.add(commands[1]);
                    break;
                case "Visit":
                    int index = Integer.parseInt(commands[2]);

                    if (index <= shopLine.size() && index >= 0) {

                        if (commands[1].equalsIgnoreCase("first")) {
                            for (int i = 0; i < index; i++) {
                                shopLine.remove(0);
                            }
                        } else if (commands[1].equalsIgnoreCase("last")) {
                            int len = shopLine.size();
                            for (int i = len - 1; i > len - 1 - index; i--) {
                                shopLine.remove(i);
                            }
                        }
                    } else {
                        break;
                    }
                    break;
                case "Prefer":
                    int one = Integer.parseInt(commands[1]);
                    int two = Integer.parseInt(commands[2]);
                    if (one >= 0 && two >= 0 && one < shopLine.size() && two < shopLine.size()) {
                        String w1 = shopLine.get(one);
                        String w2 = shopLine.get(two);
                        shopLine.set(one, w2);
                        shopLine.set(two, w1);
                    }
                    break;
                case "Place":
                    int index1 = Integer.parseInt(commands[2]);
                    if (index1 <= shopLine.size() - 1 && index1 >= -1) {
                        shopLine.add(index1 + 1, commands[1]);
                    }
                    break;
            }
        }
        System.out.print("Shops left:");
        System.out.println();
        System.out.println(String.join(" ", shopLine));
    }
}