题解 | #明明的随机数#

TreeSet秒了

import java.util.Scanner;
import java.util.Set;
import java.util.TreeSet;

// 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 count = in.nextInt();
        TreeSet<Integer> set = new TreeSet<>();
        for (int i = 0; i < count; i++) {
            int val = in.nextInt();
            set.add(val);
        }
        for (Integer it : set) {
            System.out.println(it);
        }
    }
}