HackerRank Python Problem No7 || Dictionary ||reduce function
We have a record of students. Each record contains the student's name, and their percent marks in Maths, Physics and Chemistry. The marks can be floating values. The user enters some integer followed by the names and marks for students. We are required to save the record in a dictionary data type. The user then enters a student's name. Output the average percentage marks obtained by that student, correct to two decimal places.
Input Format
The first line contains the integer , the number of students' records. The next lines contain the names and marks obtained by a student, each value separated by a space. The final line contains query_name, the name of a student to query.
Output Format
Print one line: The average of the marks obtained by the particular student correct to 2 decimal places.
Sample Input 0
3
Krishna 67 68 69
Arjun 70 98 63
Malika 52 56 60
Malika
Sample Output 0
56.00
Explanation 0
Marks for Malika are whose average is
Sample Input 1
2
Harsh 25 26.5 28
Anurag 26 28 30
Harsh
Sample Output 1
26.50
Alternate solution:
if _name_ == '__main__':
n = int(input())
student_marks = {}
for _ in range(n):
name, *line = input().split()
scores = list(map(float, line))
student_marks[name] = scores
query_name = input()
query_score=student_marks[query_name]
a=(sum(query_score)/n)
print("{0:.2f}".format(a))
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