题解 | 明明的随机数

import java.util.Scanner;

// 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];
        for (int i = 0; i < n; i++) {
            a[i] = in.nextInt();
        }
        for (int i = 0; i < n-1; i++) {
            for (int j = i+1; j < n; j++) {
                if (a[i] > a[j]) {
                    int k = a[i];
                    a[i] = a[j];
                    a[j] = k;
                }
            }
        }

        int[] b = new int[n];
        b[0] = a[0];
        int len = 0; //记录数组真实长度
        for (int i = 1; i < n; i++){  //扫描a
            if (b[len] == a[i]) continue;
            b[++len] = a[i];
        }
        for (int i = 0; i <= len; i++) {
            System.out.println(b[i]);
        }
    }
}