package leetcode.huawei;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import java.util.Scanner;

/**
 * @Description
 * @Author msli
 * @Date 2021/10/11
 */

public class HJ3 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) {
            int n = in.nextInt();
            int[] temp = new int[n];
            for (int i = 0; i < n; i++) {
                temp[i] = in.nextInt();
            }
            Arrays.sort(temp);
            List<Integer> res = new ArrayList<>();
            for (int i = 0; i < temp.length; i++) {
                if (res.isEmpty() || res.get(res.size()-1) != temp[i]) {
                    res.add(temp[i]);
                }
            }
            res.forEach(System.out::println);
        }
    }
}