TÓPICO
Run Time Error ?
jvlacerda perguntou 4 years ago
from collections import Counter
while True:
n = int(input())
if n == 0:
break
lst = input().split()
lst = Counter(lst)
a = []
for k, v in lst.items():
if v % 2 == 1:
a.append(int(k))
a.sort()
print('{} {}'.format(a[0], a[1]))