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fromcollectionsimportnamedtuplen,cols=int(input()),input().split()Student=namedtuple('Student',cols)print(f"{sum(int(Student(*input().split()).MARKS) for _ in range(n))/n:.2f}")
fromcollectionsimportnamedtupleN,Record=int(input()),namedtuple('Record',input().split())print(f"{(sum(int(Record._make(input().split()).MARKS) for _ in range(N)))/N :.2f}")
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