PHP, @Jörg Hülsermann
$n=next($argv);$a=array();for($i=0;$i<$n;++$i){$f=$i*$n;$g=$f+++$n;$a{$i}=$i&1?range($g,$f):range($f,$g);}echo(serialize($a));; In PHP, range(1, 4) gives [1, 2, 3, 4] while range(4, 1) gives [4, 3, 2, 1]. o_O.
kennytm
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