#include <iostream>
#include <algorithm>
#include <queue>
#include <vector>
#include <cstring>
#include <string>
#include <string.h>
#include <stdio.h>
#include <cmath>
#include <map>
#include <functional>
#include <set>
using namespace std;
//1158
int t;
set<int> s;
set<int>::const_iterator iter;
int main(){
int n;
//freopen("input.txt","r",stdin);
while(cin>>n){
s.clear();
while(n--){
cin>>t;
s.insert(t);
}
bool f=true;
for(iter=s.begin();iter!=s.end();++iter){
if(f){
cout<<*iter;f=false;
}
else cout<<" "<<*iter;
}
cout<<endl;
}
return 0;
}
/**************************************************************
Problem: 1041
User: cust123
Language: C++
Result: Accepted
Time:10 ms
Memory:1524 kb
****************************************************************/
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