This doesn't deal with duplicates. If you want to deal with duplicates, I think you change it to:
sub nn {
@_{@_}=0;@_=sort{$a<=>$b}keys%_;
$_[1]-$_[0]>$_[$_]-$_[$_-1]and@_[0,1]=@_[$_,$_-1]for 2..$#_;
@_[0,1]
}
That brings the total from 86 to 99. I'm not sure if the spec requires that duplicates be treated as one element or separate elements.
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