a = int(input())

set_a = list(map(int, input().split()))

seen_once = set()

seen_multiple = set()

for i in set_a: if i in seen_once: seen_multiple.add(i) else: seen_once.add(i) unique_elements = seen_once - seen_multiple for element in unique_elements: print(element)

from collections import Counter

k = int(input())

room_no = list(map(int,input().split()))

room_count = Counter(room_no)

for keys, values in room_count.items():

if values < 5: print(keys)

here's my code:

k=int(input ()) s=list(map(int, input() .split())) s1=set() s2=set() for i in s: if i in s1: s2. add (i) else: s1. add (i) result=s1-s2 print (*result)

Here's my code:

k, t = int(input()), list(map(int, input().split()))
print(((sum(set(t))*k)-sum(t))//(k-1))

from collections import Counter k = int(input()) room = list(map(int, input().split())) count = Counter(room) for k,v in count.items(): if v == 1: print(k)