set easy

#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define fastread()(ios_base:: sync_with_stdio(false),cin.tie(NULL));
int main()
{
    fastread();

     set<int>s;
     int n;
     cin>>n;
     while(n--)
     {
         int a;
         cin>>a;
         s.insert(a);
     }
     for(auto x:s)
     {
         cout<<x<<endl;
     }
     cout<<" "<<s.size()<<" "<<s.empty();

}