import java.io.BufferedReader; import java.io.IOException; import java.io.InputStreamReader; import java.util.*; public class Main { public static void main(String[] args) throws IOException { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int n = Integer.parseInt(reader.readLine()); Set<integer> set = new TreeSet<>(); for(int i = 0; i < n; i++) { set.add(Integer.parseInt(reader.readLine())); } for(int a : set) { System.out.println(a); } } }</integer>