Problem
Given the names and grades for each student in a Physics class of N students, store them in a nested list and print the name(s) of any student(s) having the second lowest grade.
Note: If there are multiple students with the same grade, order their names alphabetically and print each name on a new line.
Input Format
The first line contains an integer, N, the number of students.
The 2N subsequent lines describe each student over 2 lines; the first line contains a student’s name, and the second line contains their grade.
Constraints
- 2 <= N <= 5
- There will always be one or more students having the second lowest grade.
Output Format
Print the name(s) of any student(s) having the second lowest grade in Physics; if there are multiple students, order their names alphabetically and print each one on a new line.
Sample Input 0
5 Harry 37.21 Berry 37.21 Tina 37.2 Akriti 41 Harsh 39
Sample Output 0
Berry Harry
Explanation 0
There are 5 students in this class whose names and grades are assembled to build the following list:
python students = [['Harry', 37.21], ['Berry', 37.21], ['Tina', 37.2], ['Akriti', 41], ['Harsh', 39]]
The lowest grade of 37.2 belongs to Tina. The second lowest grade of 37.21 belongs to both Harry and Berry, so we order their names alphabetically and print each name on a new line.
Solution
students = []
score_list = []
for _ in range(int(input())):
temp = []
name = input()
score = float(input())
temp.append(name)
temp.append(score)
score_list.append(score)
students.append(temp)
score_list = list(dict.fromkeys(score_list))
score_list.sort()
if len(students) >= 2:
second_lowest_students = []
second_lowest_score = score_list[1]
for i in students:
if second_lowest_score in i:
# print(i[0])
second_lowest_students.append(i[0])
else:
pass
print('\n'.join(sorted(second_lowest_students, key=lambda second_lowest_students: second_lowest_students)))
else:
print(students[0][0])The key to this problem is prepare two groups of list. One list consists of student and its score. e.g. [['Ken', 20.0], ['Jenny', 34.0], ['Lee', 20.0], ['Paul', 54.0]]
Other list is collection of scores based on the score inputs. (score_list) This list will help you to rank from lowest to highest. (The list is also cleaned up duplicates) e.g. [20.0, 34.0, 54.0]
The rest is, check the value of second lowest score in the score_list and check if there is a match in the students list with that scoring.