import random

aa=[]
a=int(input())
if 1<= a <= 1000:
    for t in range(1,a+1):
       b=int(input())
       if 1<= b <= 500:
          aa.append(b)
cc=set(aa)
d=list(cc)
e=sorted(d,reverse=False)
# print(e)
for t in e:
    print(t)