南阳理工OJ之奇偶数分离

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