import sys

def sort_rand(n):
    num_list=[]
    for i in range(n):
        num_list.append(int(input()))

    sorted_unique = sorted(set(num_list))
    return sorted_unique

if __name__ == '__main__':
    n=int(input(""))
    numbers= sort_rand(n)
    for v in numbers:
        print(v)