2024 S1 - Hat Circle

1# By William Yang , Milliken Mills High School
2num_people = int(input())
3hat_num = []
4for i in range(num_people):
5    hat_num.append(int(input()))
6
7people_seeing = 0
8# iterate through half the list:
9for hat_number in range(int(num_people/2)):
10    if hat_num[hat_number] == hat_num[int(hat_number+num_people/2)]:
11        people_seeing += 1
12print(people_seeing*2)