题解 | #明明的随机数#

import java.util.*;

public class Main { public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);
    
    while(true) {
        if (!sc.hasNextInt())
            break;
        int n = sc.nextInt();
        Set<Integer> set = new TreeSet<>();
        for (int i = 0; i < n; i ++) {
            int a = sc.nextInt();
            set.add(a);
        }
        for (int i : set) {
            System.out.println(i);
        }
    }
}

}