CEN303_2016Questions |
Старт: 28.окт.2016 в 17:00:00
Финиш: 01.ноя.2016 в 05:00:00
Турнир завершён!
• Турнирная таблица
|
|
Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб. Question by Ibrahim Mesecan.
Preparing Keyword Index
Question:
The books have indexes at the end, so that, people can
search for a specific topic or section using a keyword.
You are given the index pages with keywords.
Then, you are asked to prepare the index of the book.
Write a program which reads the page and keyword
information. Then, the program should print the index pages
for a given word.
Input specification:
In the first line, you will be given two integers:
the number of pages (n) with keywords, and the max
number of index pages to keep (max).
The following n lines start with two integers the page
number (p) and the number of keywords (k) in that page
where keywords are all in lowercase and contain only
26 English letters with no special char.
Then, you will be given k keywords in the same line.
After that, you will be given a keyword.
Where 1 ≤ n ≤ 40,000, 1 ≤ max ≤ 100
and there may at most 50
keywords in one page.
Output specification:
Show the pages that the given keyword appears in ascending order.
Show 0, if it doesn't appear on any page.
Note: Keep at most max unique-index pages for
every keyword. The max index pages will be decided according
to the order of appearance. The index page appearing on the
after max pages or later will be ignored.
Sample Input
4 2
1 3 index book index
4 1 keyword
7 3 index search appear
5 3 index keyword search
index
|
Sample Output
1 7
|
Explanation:
There are four pages with keywords and maximum
(the first) 2 index pages will be shown.
Page 1 contains 2 keywords: book and index,
and, there are 5 keywords in total. The following is the
list of keywords and their appearing pages:
- appear 7
- book 1
- index 1 5 7
- keyword 4 5
- search 5 7
Although, index word appears on three pages: 1, 5 and 7,
the program should show only the first
two pages 1 7 according to order of appearance, because
Max pages given as 2.
Для отправки решений необходимо выполнить вход.
|