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- package bgstudents;
- import java.lang.reflect.Array;
- import java.util.*;
- import java.util.stream.Collectors;
- public class main {
- public static void main(String[] args) {
- Scanner input = new Scanner(System.in);
- List<String> Lessons = Arrays.stream(input.nextLine().split(", ")).collect(Collectors.toList());
- String newInput = input.nextLine();
- while(!newInput.equalsIgnoreCase("course start")){
- List <String> Split = Arrays.stream(newInput.split(":")).collect(Collectors.toList());
- String Command = Split.get(0);
- String lessonTitle = Split.get(1);
- switch(Command){
- case"Add":
- if(!Lessons.contains(lessonTitle)){
- Lessons.add(lessonTitle);
- }
- break;
- case"Insert":
- int Index = Integer.parseInt(Split.get(2));
- if(!Lessons.contains(lessonTitle)){
- if(Index>=0 && Index<Lessons.size()) {
- Lessons.add(Index, lessonTitle);
- }
- }
- break;
- case"Remove":
- String exerciseTitle = Split.get(1)+"-Exercise";
- if(Lessons.contains(lessonTitle) && Lessons.contains(exerciseTitle)){
- Lessons.remove(lessonTitle);
- Lessons.remove(exerciseTitle);
- }
- if(Lessons.contains(lessonTitle)){
- Lessons.remove(lessonTitle);
- }
- if(Lessons.contains(exerciseTitle)){
- Lessons.remove(exerciseTitle);
- }
- break;
- case"Swap":
- String lessonTitle2 = Split.get(2);
- if(Lessons.contains(lessonTitle) && Lessons.contains(lessonTitle2)) {
- int indexOfFirst = Lessons.indexOf(lessonTitle);
- int indexOfSecond = Lessons.indexOf(lessonTitle2);
- String tempValue = Lessons.get(indexOfFirst);
- Lessons.set(indexOfFirst, lessonTitle2);
- Lessons.set(indexOfSecond, tempValue);
- if(Lessons.contains(lessonTitle+"-Exercise")){
- String tempName = lessonTitle+"-Exercise";
- Lessons.remove(lessonTitle + "-Exercise");
- if(indexOfSecond+1<=Lessons.size()-1){
- Lessons.add(indexOfSecond+1,tempName);
- }else{
- Lessons.add(tempName);
- }
- }
- else if(Lessons.contains(lessonTitle2+"-Exercise")){
- String tempName = lessonTitle2+"-Exercise";
- Lessons.remove(lessonTitle2 + "-Exercise");
- if(indexOfFirst+1<=Lessons.size()-1){
- Lessons.add(indexOfFirst+1,tempName);
- }else{
- Lessons.add(tempName);
- }
- }
- }
- break;
- case"Exercise":
- String newValue = lessonTitle+"-Exercise";
- if (Lessons.contains(lessonTitle)) {
- if (!Lessons.contains(lessonTitle + "-Exercise")) {
- int indexOf = Lessons.indexOf(lessonTitle);
- if (indexOf <= Lessons.size() - 1) {
- Lessons.add(indexOf + 1, newValue);
- } else {
- Lessons.add(newValue);
- }
- }
- }
- else{
- Lessons.add(lessonTitle);
- Lessons.add(newValue);
- }
- }
- newInput=input.nextLine();
- }
- int count =0;
- for(int i=0;i<=Lessons.size()-1;i++){
- count++;
- System.out.printf("%s.%s\n",count,Lessons.get(i));
- }
- }
- }
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