students = int(input('Enter the number of Students: '))
i = 1
dic = {}

while i <= students:
    inp = input("Enter the names and marks of the Student:  ").split(' ')
    dic[inp[0]] = inp[1:]
    i += 1

get_item = input('Enter the name of the Student to calculate the Average: ')
for k,v in dic.items():
   test_list = [int(i) for i in v]
   dic.update({k:test_list})
if get_item in dic.keys():

    n = dic[get_item]
    print(sum(n)/len(n))