题解 | #明明的随机数#

while True:
    try:
        N = int(input())
        if N < 1 or N > 1000:
            break
        listn = []
        index = 0
        while index < N:
          y = int(input())
          index += 1
          if y < 1 or y > 500:
            index-=1
            continue
          listn.append(y)


        z = set(listn)
        k = list(z)
        sortk = sorted(k)
        for f in sortk:
            print(f)
    except:
        break