【明明的随机数】 （Java代码）

解题思路:

注意事项:

参考代码:

import java.util.*;

public class Test1165 {

public static void main(String[] arg) {

Scanner sc = new Scanner(System.in);

int N = sc.nextInt();

int m = 0;//重复个数

int f[] = new int[N];

for (int i = 0; i < f.length; i++) {

f[i] = sc.nextInt();

}

Arrays.sort(f);

for (int i = 0; i < f.length - 1; i++) {

if (f[i] == f[i + 1]) {

m++;

f[i] = 0;

}

}

System.out.println(N - m);

for (int i = 0; i < f.length; i++) {

if (f[i] != 0)

System.out.print(f[i] + " ");

}

}

}