题解 | #明明的随机数#

import java.util.Scanner;

import java.util.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
 public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.nextLine());
        Set<Integer> set = new TreeSet();
        for(int i = 0; i < n; i++) {
            set.add(Integer.parseInt(sc.nextLine()));
        }
        Iterator it = set.iterator();
        while(it.hasNext()) {
            System.out.println(it.next());
        }
    }
}