Re: sort numbers

[Ton Hospel]

In article <[EMAIL PROTECTED]>,
        artist google <[EMAIL PROTECTED]> writes:
> Hi,
>  I have this puzzle.
>  Given N numbers, N>4, you have to sort the numbers.
>  The only operation permitted is you can rotate any
> sequencial 4 numbers in reverse order. or you can
> roate the entire list sequencially.
> 
> How do u approach this??
> 
What is a reverse/sequential rotation ?