View difference between Paste ID: MvHEk1wn and ptsB4X3B

 import java.util.ArrayList;
 import java.util.Arrays;
 import java.util.List;
 import java.util.Scanner;
 import java.util.stream.Collectors;
 
 public class Main {
     public static void main(String[] args) {
         Scanner scanner = new Scanner(System.in);
         //"32 54 21 12 4 0 23" -> split(" ") -> ["32", "54", "21", "12", "4", "0", "23"]
         List<Integer> numbers = Arrays.stream(scanner.nextLine().split(" ")).map(Integer::parseInt).collect(Collectors.toList());
         String command = scanner.nextLine();
         while(!command.equals("End")){
             //•	"Add {number}" - add number at the end
             //•	"Insert {number} {index}" - insert number at given index
             //•	Remove {index} - remove that index
             //•	Shift left {count} - first number becomes last 'count' times
             //•	Shift right {count} - last number becomes first 'count' times
             String[] commandData = command.split("\\s+");
             String commandName = commandData[0];
             switch(commandName) {
                 case "Add":
                     int numberToAdd = Integer.parseInt(commandData[1]);
                     numbers.add(numberToAdd);
                     break;
                 case "Insert":
                     int numberToInsert = Integer.parseInt(commandData[1]);
                     int insertIndex = Integer.parseInt(commandData[2]);
                     if(isValidIndex(insertIndex, numbers.size())) {
                         numbers.add(insertIndex, numberToInsert);
                     } else {
                         System.out.println("Invalid index");
                     }
                     break;
                 case "Remove":
                     int removedIndex = Integer.parseInt(commandData[1]);
                     if(isValidIndex(removedIndex, numbers.size())){
                         numbers.remove(removedIndex);
                     } else {
                         System.out.println("Invalid index");
                     }
                     break;
                 case "Shift":
                     String shiftType = commandData[1]; //left or right
                     int count = Integer.parseInt(commandData[2]);
                     if (shiftType.equals("left")) {
                         shiftLeft(numbers, count);
                     } else if (shiftType.equals("right")) {
                         shiftRight(numbers, count);
                     }
                     break;
             }
 
 
             command = scanner.nextLine();
         }
 
         for (int number : numbers) {
             System.out.print(number + " ");
         }
 
     }
 
     private static void shiftRight(List<Integer> numbers, int count) {
         for (int i = 0; i < count; i++) {
             //взимаме последния елемент -> слагам го на първо място (индекс = 0) -> премахвам от последното място
             int lastElement = numbers.get(numbers.size() - 1);
             numbers.add(0, lastElement);
             numbers.remove(numbers.size() - 1);
         }
     }
 
     private static void shiftLeft(List<Integer> numbers, int count) {
         for (int i = 0; i < count; i++) {
             //взимам първия елемент -> слагам накрая -> премахвам от първото място
             int firstNumber = numbers.get(0);
             numbers.add(firstNumber);
             numbers.remove(0);
         }
 
     }
 
     public static boolean isValidIndex(int index, int size) {
         //true -> е валиден
         //false -> е невалиден
         return index >= 0 && index <= size - 1;
     }
 }