Здравейте, 

може ли да помоля за помощ за следната задача при която получавам 90/100 точки.

решението и условието:

https://pastebin.com/ZSN0kk5C

https://judge.softuni.bg/Contests/Practice/Index/1682#2

Contact List

Create a program that helps you keep track of the contacts that you have. You will receive the list of contacts you already have on a single line, separated by a single space in the following format:

"{contact1} {contact2} {contact3}… {contactn}"

Then you will receive commands that you need to execute over your list. There are four possible commands:

• "Add {contact} {index}":

  • If {contact} isn’t already contained – add it in the end of the collection.

  • If {contact} is already contained – add it on the given index, if the index exists.

• "Remove {index}"

  • Remove the contact on the given index, if the index exists.

• "Export {startIndex} {count}":

  • Print the next {count} contacts starting from the given {startIndex} (including), separated by a single space. If the count requested is more than the contacts- just print them to the end.
    "{contact} {contact} {contact}"

• "Print Normal/Reversed"

  • Print the contact list in normal (in the order they have been added) or reversed order and then stop the program:

"Contacts: {contact1} {contact2}… {contactn}"

Input

• On the 1st line, you will receive the starting list with the names of the contacts separated by a single space.

• On the next lines, you will receive commands in the format described above.

Output

• Print the needed output upon the "Export" command.

• ePrint the list after the manipulations upon the "Print" command in the format described above.

Examples