题解 | 明明的随机数

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 in = new Scanner(System.in);
        int n = in.nextInt();
        int[] a = new int[n];
        TreeSet<Integer> tset = new TreeSet<>();
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
            tset.add(a[i]);
        }
        while (!tset.isEmpty()) {
            System.out.println(tset.pollFirst());
        }
    }
}