CEN112 Questions 2016 |
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Лимит времени 2000/4000/4000/4000 мс. Лимит памяти 65000/65000/65000/65000 Кб. Question by Ibrahim Mesecan.
The most successful classes
Ministry of Education wants to award the most
successful classes throughout the country. After the
graduation exams, the class success is calculated by the
percentage of the students who are above or equal to certain
grade (k) to the number of students in the class (The students
whose average is above k is assumed to be successful).
Question:
Write a program that reads the student averages for n
classes. And it defines the most successful m classes.
Input specification:
In the first line, you will be given three integers:
the number of classes (n), the number of top (m) classes to
list and the lower limit (k) of success for students.
The following n lines contain at most 60 grades
followed by commas. The last student grade is followed
by a semicolon where 1 ≤ m ≤ n ≤ 20,000. k and
the student grades are integers between 1 and 10,000.
Output specification:
Show the ids (order of appearance) of the most successful
m classes. If the success of two classes are the same (use
4-digit precision, 0.0001), show the class with the smaller
id first.
Sample Input
5 2 76
54, 81, 76, 95, 68, 69, 41;
78, 52, 65, 40;
91, 72, 97, 81, 78;
50, 52, 78, 77, 96, 96, 41;
78, 74, 59;
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Sample Output
3 4
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Explanation:
There are 5 classes. The table below shows the success percentages
of classes.
Class ID |
# successful students |
Percentage |
1 | 3 |
42.86% |
2 | 1 |
25% |
3 | 4 |
80% |
4 | 4 |
57.14% |
5 | 1 |
33.33% |
There are 3 students above k (76) in the first class, etc.
And thus, the classes 3 and 4 are the most successful two classes.
Для отправки решений необходимо выполнить вход.
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