题解 | #明明的随机数#

sorted() is a jolly good thing.
so as set() lol.

data = []
while True:
    try:
        n = input()
        ta = []
        for i in range(int(n)):
            ta.append(int(input()))
        uniq = set(ta)  # set transform the list into a unique one (NO DUPs)
        for j in sorted(uniq):
            print(j)
    except (EOFError, KeyboardInterrupt):
        break