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Турниры > CEN112 Questions 2016 > задача:


15-PE2-2. 50981 - Top popular m-students

CEN112 Questions 2016

Старт: 30.мар.2016 в 15:10:22
Финиш: 01.апр.2016 в 05:00:00
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Задачи турнира

• 15-MdtE-6. 50914 - Buy 3, Pay 2
• 15-PE-1. 50865 - Apartment Building...
• 15-PE-2. 50866 - Buy the cheapest
• 15-PE-4. 50868 - Sort Frequencies
• 15-PE-5. 50869 - Birthday Celebration
• 15-PE-7. 50871 - Harmonic Mean
• 15-PE-8. 50872 - Top M Grades
• 15-PE2-1. 50980 - The smallest rect...
• 15-PE2-2. 50981 - Top popular...
• 15-PE2-2. 50984 - Top m hardworki...
• 15-PE2-2. 51086 - Top popular student
• 15-PE2-3. 50982 - A thief in labyrinth
• 15-PE2-4. 50983 - Course Selection
• 15-PE2-6. 50985 - Books Waiting
• 15-PE2-8. 50987 - Very Looong Queue
• 15-RE-2. 50999 - Overlapping Trips
• 3. 51002 - The most successful classes

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Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб.
Question by Ibrahim Mesecan.

Top popular m-students

Question: For a contest, you are searching for the top-m popular students of the university. You are given friends list of n students where some students may appear several times. Count the unique number of friends for each student and identify the top m popular students who have the most number of friends.

Input specification You will be given two integers in the beginning: the number of students (n) and top m students to list. In each of the following n lines, you will be given several positive integers (friends of the current student) ending with a negative number where 0 ≤ m ≤ n ≤ 8,000.

Output specification: Show the IDs (order of appearance) of top m students who have the most number of friends. If there are several students with the same number friends, first show the student with a smaller ID.

Sample Input
7 3
5 5 7 7 1 -1
6 4 2 5 6 -1
6 6 7 4 5 4 -1
2 7 1 1 7 7 6 5 -1
3 6 4 7 -1
7 6 6 1 7 -1
3 4 5 2 5 1 1 -1
Sample Output
4 7 2

Explanation: Here is the list of students with their number of friends.
  1 -> 3
  2 -> 4
  3 -> 4
  4 -> 5
  5 -> 4
  6 -> 3
  7 -> 5



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