Here is the code it says that it fails for test case n=6 , but n=6 is not possible here. Pls HELP

Your code actually fails for n=8, and its output:

```
YES
1 3 5 8
2 4 6 7
```

This does not meet the conditions \sum\limits a=\sum\limits b.

\sum\limits a=17 and \sum\limits b=19.

Thankyou.