NYOJ题目839合并

 1 import java.util.Scanner;
 2 
 3 public class Main {
 4 
 5     public static void main(String[] args) {
 6         
 7         
 8         Scanner sc=new Scanner(System.in);
 9         
10         int times=sc.nextInt();
11         while(times-->0){
12             
13             int n=sc.nextInt();
14             int book[]=new int[100];
15             
16             for(int i=0;i<n*2;i++){
17                 book[sc.nextInt()]=1;
18             }
19 
20             for(int i=0;i<book.length;i++){
21                 if(book[i]==1) System.out.print(i+" ");
22             }
23             System.out.println();
24             
25         }
26         
27     }
28     
29 }