Здравейте, 

Получавам 60/100 на тази задача: https://pastebin.com/F7e9Njxx и не мога да открия какво пропускам. Не съм я решила по много "функционален" начин, затова ще бъда благодарна и на малко съвети в тази посока.

Ето и условието на задачата: 

Problem 11.  Party Reservation Filter Module

You need to implement a filtering module to a party reservation software. First, to the Party Reservation Filter Module (PRFM for short) is passed a list with invitations. Next the PRFM receives a sequence of commands that specify whether you need to add or remove a given filter.

Each PRFM command is in the given format:

"{command;filter type;filter parameter}"

You can receive the following PRFM commands:

• "Add filter"
• "Remove filter"
• "Print"

The possible PRFM filter types are:

• "Starts with"
• "Ends with"
• "Length"
• "Contains"

All PRFM filter parameters will be a string (or an integer only for the "Length" filter). Each command will be valid e.g. you won’t be asked to remove a non-existent filter. The input will end with a "Print" command, after which you should print all the party-goers that are left after the filtration. See the examples below:

Examples