题解 | #明明的随机数#

用sort将数组排序，输出是去重，数组的元素不能和前一个相同||第一个数字可以输出

```import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int n = scanner.nextInt();
        int[] num = new int[n];
        for (int i = 0;i < n;i++)
            num[i] = scanner.nextInt();
        Arrays.sort(num);
        for (int i = 0; i < num.length; i++)
            if(i==0||num[i] != num[i-1]){
                System.out.println(num[i]);
            }
    }
}