题解 | #明明的随机数#

import sys
n=eval(input())
a=[]
for i in range(n):
    a.append(eval(input()))
b=[]
for i in range(n):
    for j in range(i):
        if a[i]<a[j]:
            a[i],a[j]=a[j],a[i]
for i in range(n):
    if i!=n-1 and a[i]==a[i+1]:
        i=i+1
    else:
        b.append(a[i])
for i in range(len(b)):
    print(b[i])