#include <bits/stdc++.h>
using namespace std;
int main() {
int n;
vector <int> Num;
cin>>n;
for(int i = 0; i < n; ++i)
{
int temp;
cin>>temp;
Num.push_back(temp);
}
sort(Num.begin(), Num.end());
for(int i = 0, last = -1; i < n; ++i)
{
if(last != Num[i])
{
cout<<Num[i]<<endl;
last = Num[i];
}
}
}
// 64 位输出请用 printf("%lld")

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