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num, Student = int(input()), namedtuple("Student", input() )
print(f"{sum([int(Student(*input().split()).MARKS) for _ in range(num)])/num:.2f}")
1 line of code is enough
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Collections.namedtuple()
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from collections import namedtuple
num, Student = int(input()), namedtuple("Student", input() ) print(f"{sum([int(Student(*input().split()).MARKS) for _ in range(num)])/num:.2f}") 1 line of code is enough