题解 | 明明的随机数

import java.util.Scanner;
import java.util.HashSet;
import java.util.Arrays;
import java.util.ArrayList;
import java.util.Collections;

// 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();
        HashSet<Integer> set = new HashSet<Integer>();
        for (int i=0;i<n;i++){
            int num =in.nextInt();
            set.add(num);
        }
        ArrayList<Integer> list = new ArrayList<>(set);
        Collections.sort(list);
        for(int num1 :list){
            System.out.println(num1);
        }
        

    }
}